Migrating between two Exchange 2003 servers

[markduffy]

Hope someone may be able to advice with this one:

we currently have an exchange 2003 infrastructure (Domain1.com) in place of approx 3000 users, we have merged with another company and have created a new AD & Exchange infrastructure (Domain2.com) alongside the existing one to merge the two companies together, as the external mx-record will be pointing into the server at Domain1.com is there any way we migrate these users to the new domain whilst forwarding their old mail to the new server in Domain2.com without migrating them all at once??

(Not sure if what I have typed is clear)

Thanks in advance

Mark

[sheets tabuer]

As long as you have an AD connector between the two you can home them on the domain2 server, you can also get this to accept mail for the domain as long as you point the mx record of domain 1 to domain 2 server and specify it should accept mail for that domain in recipient policies, tho it is late and I have had vodka

[markduffy]

sheets tabuer said:

As long as you have an AD connector between the two you can home them on the domain2 server, you can also get this to accept mail for the domain as long as you point the mx record of domain 1 to domain 2 server and specify it should accept mail for that domain in recipient policies, tho it is late and I have had vodka

so if we were to migrate 500 users to domain2 and move their malboxes from domain1, the server in domain1 would recieve an e-mail from an external source and forward it to the server in domain2 ( i thought it would return a 550 error)

[theboss]

markduffy said:

sheets tabuer said:

As long as you have an AD connector between the two you can home them on the domain2 server, you can also get this to accept mail for the domain as long as you point the mx record of domain 1 to domain 2 server and specify it should accept mail for that domain in recipient policies, tho it is late and I have had vodka

so if we were to migrate 500 users to domain2 and move their malboxes from domain1, the server in domain1 would recieve an e-mail from an external source and forward it to the server in domain2 ( i thought it would return a 550 error)

You can make Exchange share SMTP namespaces with other mail systems, in this case your second Exchange infrastructure.

To do this you make both servers accept mail for both domains, but then make 'Server1' non-authoritative for both domains and make an SMTP connector for both domains pointing to 'Server2', with the 'allow relaying' box checked.

Then when Server1 receives mail for a local recipient it delivers it, as you would expect, otherwise it simply forwards it using the SMTP connector to 'Server2'. 'Server2' will then lookup the recipient addresses, if local then it will deliver, if not then it will return an NDR.

This should explain in more detail http://technet.microsoft.com/en-us/library/465d8ac...

Edited by theboss on Sunday 3rd June 10:22