Planning to migrate Exchange 2003 to Exchange 2010 from one domain to another domain which already have exchange 2007 Exchange setup.
My company is merged with another company which is having Exchange 2007 setup.
Current Setup :
1. My Domain : xyz.com
2. Active Directory : Windows 2003 functional level with windows 2008 servers as ADC
3. Exchange : Exchange 2003
Merged Company :
1. Domain Name : abc.com
2. Active Directory : Windows 2003 functional level
3. Exchange : Exchange 2007
Our requirement as below :
1. Migrate Exchange environment of xyz.com to abc.com so that mail communication will be migrated to new company.
2. Understanding future vision, deploy Exchange 2010 servers in abc.com domain & migrate user data from xyz.com exchange to abc.com exchange.
3. abc.com don't have plan to upgrade their Exchange 2007 to 2010.
4. Post migration end users ID will be in xyz.com however mailbox will be in abc.com
Need to understand how to plan this migration with best possible way. Also need to understand if any drawback & prerequisites to abc.com or xyz.com due to this proposed setup.
Also is their any better way to achieve the requirement.