Small environment, 50 users
Hostile acquisition
Exchange 2003 users are in Domain A and need to have *only* email migrated to Exchange 2013 in Domain B
No Trusts, manual cut-over.
50 mailboxes pre-created in target and everything else re-created as required.
Users will STILL log into Domain A after cutover into old Domain B
Exchange 2003 Decomission = unknown timline
What kind of issues will this present to the Outlook client still logging into the existing Domain.
i.e. persistent authentication etc (Outlook 2007 and above)
Comments?