Hi,
We have an Exchange 2010 in place in our current single Forest AD 'EX2010'. In here are our Users, Computers, Servers.
We have a new Forest in place, which is essentially a Resource Forest, with two way trust to EX2010. In here we are deyploying new technology only: Exchange 2013, Lync 2013, SharePoint 2013 etc.
now we want to migrate from our old EX2010 to the new EX2013, with temporary coexistance. I have FIM in place so all contacts are created in the 2013 domain, however when I actually migrate a User Mailbox from 2010 to 2013. I get a linked mailbox since my users still reside in the EX2010 domain. after that FIM fails for the migrated user since the contact and user account cannot coexist in the Ex2010 domain.
How do i resolve this situation?
thanks to anyone who can point me in the right direction.