I will be migrating several small sites from one domain to another in the same forest. The Exchange 2010 DAG is located centrally and I didnt fully understand how to reconnect the accounts to the Exchange once moved to the target domain. In Migration Manager there is an option to reconnect Exchange mailboxes. In Active Directory Processing Wizard there are options to process Exchange mailbox permissions as well as Other Exchange permissions. Then there is the Exchange Processing Wizard which seems to require some access to the Exchange server that I dont have.
My question is what is necessary for me to connect the migrated accounts back to the DAG on the target domain?