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    Exchange - Different Domain, Same Forest Users

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    • G I JonesG
      G I Jones @dbeato
      last edited by G I Jones

      @dbeato said in Exchange - Different Domain, Same Forest Users:

      @dbeato said in Exchange - Different Domain, Same Forest Users:

      @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

      Are this disjointed domains with a domain trust or domains in the same forest? The NIC should just point to the DCs doesn't matter which one has the preference as they should have both domain zones. Most Domain Controller are Global Catalog as well without any extra configuration so I do not recommend disabling it.

      Domains are in the same forest and have a trust.

      Users are able to authenticate to .org with only .org credentials from .net, .org users can access anything on .net <- This is my boss, who set it up, explaining it to me.

      How can they be in the same forest in a trust? That is impossible.

      They either have a domain trust between two domains or two domains in a forest.

      Negative, it's called a Tree-Root Trust. It exists between domains in the same forest.

      DashrenderD 1 Reply Last reply Reply Quote 0
      • DashrenderD
        Dashrender @G I Jones
        last edited by Dashrender

        @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

        @dbeato said in Exchange - Different Domain, Same Forest Users:

        @dbeato said in Exchange - Different Domain, Same Forest Users:

        @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

        Are this disjointed domains with a domain trust or domains in the same forest? The NIC should just point to the DCs doesn't matter which one has the preference as they should have both domain zones. Most Domain Controller are Global Catalog as well without any extra configuration so I do not recommend disabling it.

        Domains are in the same forest and have a trust.

        Users are able to authenticate to .org with only .org credentials from .net, .org users can access anything on .net <- This is my boss, who set it up, explaining it to me.

        How can they be in the same forest in a trust? That is impossible.

        They either have a domain trust between two domains or two domains in a forest.

        Negative, it's called a Tree-Root Trust. It exists between domains in the same forest.

        yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

        Now two forests (can't have a domain without also having a forest) can have trusts between them (I'm not sure if a domain in forest A can have it's own trust with a domain in forest B directly though?)

        G I JonesG 1 Reply Last reply Reply Quote 0
        • G I JonesG
          G I Jones @Dashrender
          last edited by

          yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

          Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

          DashrenderD 1 Reply Last reply Reply Quote 0
          • DashrenderD
            Dashrender @G I Jones
            last edited by Dashrender

            @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

            yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

            Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

            In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

            Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
            I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

            And I totally off base here?

            dbeatoD 1 Reply Last reply Reply Quote 0
            • G I JonesG
              G I Jones
              last edited by G I Jones

              Okay, so @dbeato got me thinking about forests, so I ran

              Get-ADForest

              from each DC and they show nothing but themselves. I'm thinking this is a DNS issue or the Trust might have not been configured properly. Going to start poking around there and see what I can find.

              DashrenderD dbeatoD 2 Replies Last reply Reply Quote 0
              • DashrenderD
                Dashrender @G I Jones
                last edited by

                @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                Okay, so @dbeato got me thinking about forests, so I ran

                Get-ADForest

                from each DC and they show nothing but themselves. I'm thinking this is a DNS issue or the Trust might have not been configured properly. Going to start poking around there and see what I can find.

                In a situation where you have two different forests and trusts between them, then yes, you'll need to resolve the DNS issue. But in that situation, I don't think you'll be able to host both email domains on both sides, I would expect you to be force both on one side, or one on each.

                1 Reply Last reply Reply Quote 0
                • dbeatoD
                  dbeato @G I Jones
                  last edited by

                  @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                  Okay, so @dbeato got me thinking about forests, so I ran

                  Get-ADForest

                  from each DC and they show nothing but themselves. I'm thinking this is a DNS issue or the Trust might have not been configured properly. Going to start poking around there and see what I can find.

                  No, you have two different Forest plain and simple. Each Exchange is separate in each domain.

                  G I JonesG 1 Reply Last reply Reply Quote 0
                  • dbeatoD
                    dbeato @Dashrender
                    last edited by

                    @Dashrender said in Exchange - Different Domain, Same Forest Users:

                    @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                    yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                    Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                    In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                    Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                    I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                    And I totally off base here?

                    You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                    DashrenderD 1 Reply Last reply Reply Quote 0
                    • G I JonesG
                      G I Jones @dbeato
                      last edited by

                      @dbeato said in Exchange - Different Domain, Same Forest Users:

                      @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                      Okay, so @dbeato got me thinking about forests, so I ran

                      Get-ADForest

                      from each DC and they show nothing but themselves. I'm thinking this is a DNS issue or the Trust might have not been configured properly. Going to start poking around there and see what I can find.

                      No, you have two different Forest plain and simple. Each Exchange is separate in each domain.

                      Yup, just checked it out and they are two separate Forests. Forest Trust, rather than Tree-Root Trust. Now I have to get permissions to change this or researching if hopping domains with Exchange is supported.

                      DashrenderD 1 Reply Last reply Reply Quote 0
                      • DashrenderD
                        Dashrender @dbeato
                        last edited by

                        @dbeato said in Exchange - Different Domain, Same Forest Users:

                        @Dashrender said in Exchange - Different Domain, Same Forest Users:

                        @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                        yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                        Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                        In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                        Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                        I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                        And I totally off base here?

                        You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                        Right, but my point was that they are a collective single entity.... the OP made it sound like his Exchanges were completely separate - and now seeing it's likely he does not have a single forest, but instead two forests with a trust relationship.. .no wonder he can't do what he wants.

                        dbeatoD 2 Replies Last reply Reply Quote 0
                        • DashrenderD
                          Dashrender @G I Jones
                          last edited by

                          @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                          @dbeato said in Exchange - Different Domain, Same Forest Users:

                          @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                          Okay, so @dbeato got me thinking about forests, so I ran

                          Get-ADForest

                          from each DC and they show nothing but themselves. I'm thinking this is a DNS issue or the Trust might have not been configured properly. Going to start poking around there and see what I can find.

                          No, you have two different Forest plain and simple. Each Exchange is separate in each domain.

                          Yup, just checked it out and they are two separate Forests. Forest Trust, rather than Tree-Root Trust. Now I have to get permissions to change this or researching if hopping domains with Exchange is supported.

                          Here's a question for the boss - why do you need two domains? What purpose does it serve?

                          1 Reply Last reply Reply Quote 1
                          • dbeatoD
                            dbeato @Dashrender
                            last edited by

                            @Dashrender said in Exchange - Different Domain, Same Forest Users:

                            @dbeato said in Exchange - Different Domain, Same Forest Users:

                            @Dashrender said in Exchange - Different Domain, Same Forest Users:

                            @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                            yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                            Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                            In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                            Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                            I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                            And I totally off base here?

                            You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                            Right, but my point was that they are a collective single entity.... the OP made it sound like his Exchanges were completely separate - and now seeing it's likely he does not have a single forest, but instead two forests with a trust relationship.. .no wonder he can't do what he wants.

                            Yeah, even with a domain trust you can share things between Exchanges as well.

                            DashrenderD 1 Reply Last reply Reply Quote 0
                            • DashrenderD
                              Dashrender @dbeato
                              last edited by

                              @dbeato said in Exchange - Different Domain, Same Forest Users:

                              @Dashrender said in Exchange - Different Domain, Same Forest Users:

                              @dbeato said in Exchange - Different Domain, Same Forest Users:

                              @Dashrender said in Exchange - Different Domain, Same Forest Users:

                              @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                              yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                              Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                              In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                              Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                              I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                              And I totally off base here?

                              You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                              Right, but my point was that they are a collective single entity.... the OP made it sound like his Exchanges were completely separate - and now seeing it's likely he does not have a single forest, but instead two forests with a trust relationship.. .no wonder he can't do what he wants.

                              Yeah, even with a domain trust you can share things between Exchanges as well.

                              HUH - like what?

                              1 Reply Last reply Reply Quote 0
                              • dbeatoD
                                dbeato @Dashrender
                                last edited by dbeato

                                @Dashrender said in Exchange - Different Domain, Same Forest Users:

                                @dbeato said in Exchange - Different Domain, Same Forest Users:

                                @Dashrender said in Exchange - Different Domain, Same Forest Users:

                                @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                                yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                                Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                                In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                                Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                                I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                                And I totally off base here?

                                You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                                Right, but my point was that they are a collective single entity.... the OP made it sound like his Exchanges were completely separate - and now seeing it's likely he does not have a single forest, but instead two forests with a trust relationship.. .no wonder he can't do what he wants.

                                You can do a Federation Trust between the Exchange servers to share Contacts and Calendars.
                                https://docs.microsoft.com/en-us/exchange/configure-a-federation-trust-exchange-2013-help

                                DashrenderD 1 Reply Last reply Reply Quote 0
                                • DashrenderD
                                  Dashrender @dbeato
                                  last edited by Dashrender

                                  @dbeato said in Exchange - Different Domain, Same Forest Users:

                                  @Dashrender said in Exchange - Different Domain, Same Forest Users:

                                  @dbeato said in Exchange - Different Domain, Same Forest Users:

                                  @Dashrender said in Exchange - Different Domain, Same Forest Users:

                                  @G-I-Jones said in Exchange - Different Domain, Same Forest Users:

                                  yeah - but us techies rarely (I've never seen anyone talk about it) call it that - we know that a trust exists between all domains in a Forest, that's a primary component to what makes them a forest.

                                  Ah, so what trust that's different than the automatic Tree-Root of inter-forest domains are we talking about?

                                  In this situation we don't worry about it. We know you have a Forest - so the trust issue is a non issue.

                                  Now a question for @dbeato - can you have more than one Exchange system inside a domain? I guess I was under the impression you couldn't, or at least wouldn't. This of course doesn't mean you only have one exchange server - you have as many as you need/want, but they are all part of the same Exchange group for lack of a better name, you doll out the Exchange rolls (Mailbox, Hub, Edge transport) to different Exchange servers as needed.
                                  I'm guessing most businesses only have one Edge Transport server, though if you need resiliency you might have more. The mailbox servers are what the end users normally attach Outlook to, so in G-I-Jones case he might have two: one to be closer to set of users A, and another to be closer to set of users B. But I'm pretty sure both could have .net or .org on them.

                                  And I totally off base here?

                                  You can have as many Exchange Servers in your domain as you possibly can. I have customers with a least 3 or more in different locations o regions as well. Exchange 2013 and upward allowed the access of severs through the Front End Server which proxies to the other servers as well.

                                  Right, but my point was that they are a collective single entity.... the OP made it sound like his Exchanges were completely separate - and now seeing it's likely he does not have a single forest, but instead two forests with a trust relationship.. .no wonder he can't do what he wants.

                                  You can do a Federation Trust between the Exchange servers to share Contacts and Calendars.
                                  https://docs.microsoft.com/en-us/exchange/configure-a-federation-trust-exchange-2013-help

                                  OK cool... can you move a mailbox from one side to the other and keep it's original email address?

                                  1 Reply Last reply Reply Quote 0
                                  • dbeatoD
                                    dbeato
                                    last edited by

                                    You can also setup Linked mailboxes
                                    https://docs.microsoft.com/en-us/exchange/manage-linked-mailboxes-exchange-2013-help?redirectedfrom=MSDN

                                    DashrenderD 1 Reply Last reply Reply Quote 0
                                    • DashrenderD
                                      Dashrender @dbeato
                                      last edited by

                                      @dbeato said in Exchange - Different Domain, Same Forest Users:

                                      You can also setup Linked mailboxes
                                      https://docs.microsoft.com/en-us/exchange/manage-linked-mailboxes-exchange-2013-help?redirectedfrom=MSDN

                                      not what the OP is looking for though. that's a single Exchange plant in one of the forests... from the sounds of it, forest 1 (.net) and forest 2 (.org) it sounds like the boss wants users in forest 2 to have their mailbox on forest 1 Exchange - is that possible?

                                      1 Reply Last reply Reply Quote 0
                                      • DashrenderD
                                        Dashrender
                                        last edited by

                                        you know - before we dive into all that madness - we should find out - Is there really a need for two forests? If not - get back to a single forest setup.

                                        Once there - do you really need two domains in the same forest? If the only reason the boss setup a second domain (and the second forest) was because he thought he had to inorder for Exchange to handle emails for a second domain - you need to correct that thinking, a single Exchange server can handle a huge number of email domains.

                                        scottalanmillerS G I JonesG 3 Replies Last reply Reply Quote 1
                                        • scottalanmillerS
                                          scottalanmiller @Dashrender
                                          last edited by

                                          @Dashrender said in Exchange - Different Domain, Same Forest Users:

                                          a single Exchange server can handle a huge number of email domains.

                                          Thousands

                                          1 Reply Last reply Reply Quote 0
                                          • G I JonesG
                                            G I Jones @Dashrender
                                            last edited by

                                            @Dashrender All of this could have been avoided if I would have just double checked the boss’s work in the first place. Lesson learned.

                                            I think his thoughts were that having students on a separate domain (.net) provided some sort of security measure with accessing staff domain shares and the like (.org), because they would be .net users.

                                            scottalanmillerS 2 Replies Last reply Reply Quote 0
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