This handles the "merge" case when the "Use Policy" option for Exchange
Mailbox Provisionin is chosen in the Entitlement GCV.

I cannot see where this code has been migrated into another policy, so I
think this must be a dev regression/oversight. Can anyone confirm?

I just checked and NOVLADENTEX-sub-ctp-ExchMailboxPolicy was present in
the 1.0.1 and 1.0.3 versions of this package.