OK, so I have a Communications Manager Business Edition 6.0 I installed for a customer and I think it runs Cnx 2.0 - CUCMBE 6 did not support LDAP but we were aware that feature was coming in CMBE 7 so we went ahead with it.
So now we have obtained the UCSS upgrade to 7.x and are going to upgrade, my concern is that the Cxn users are integrated with CCM end users, and when I switch to LDAP the non matching users will be deleted. The end users currently just use their extension as a username.
So my question is, will I just lose the mailboxes or will I be able to backup and restore them somehow? is there a valid migration path for this?