My company (abc.com) is merged with (xyz.com).
Abc.com setup as below:
AD Functional Level – Windows 2003
Exchange - Exchange 2003
Xyz.com setup is as below:
AD Functional Level – Windows 2003
Exchange - Exchange 2007
Before merger we already planned for AD upgrade to 2008 & Exchange upgrade to 2010
Now management is planning to migrate Exchange environment of abc.com to xyz.com with upgrade to Exchange 2010. This will be achieved by establishing connectivity between abc.com & xyz.com & installing their ADC in our premises & new Exchange 2010 servers will be installed in xyz.com (Which will located in our premises). Users will login using their abc.com credential & then access their mailbox which is hosted in xyz.com.
Need to know if this is feasible & achievable solution.
Also we are planning for AD upgrade of abc.com from 2003 to 2008. Hence post upgrade our domain will be 2008 with Exchange 2003 & xyz.com domain will be AD 2003 & Exchange 2007.
Post this migration we will planning for mailbox migration from abc.com to xyz.com hence is there any compatibility issue while migrating mailboxes from AD 2008 to 2003 i.e. from abc.com to xyz.com.
We will use xyz.com SMTP to relay incoming & outgoing mails.
Need your help to understand it this is feasible solution to implement.