Source - Exchange 2010 SP3
Target - Exchange 2013 SP1
We are in the midst of a forklift AD migration. In doing so we are upgrading/migrating our existing Exchange 2010 environment to Exchange 2013. So far so good. I have migrated a few pilot users without issue. Free/busy is good. Mailflow is good.
My question revolves around shared mailboxes. What is the best method for a user who resides on Exchange 2013 (source) to access a shared mailbox on Exchange 2010 (target).
These users were given full mailbox permission originally before migration. We do have SID history turned on. They would open the mailbox from within outlook using their own profile. I can get them to open the shared mailbox if they close outlook and open a profile with the shared mailbox, but I would rather they continue to work the way they are used to.
Thoughts?