Problem: the dynamic mail-enabled security groups (DMESG) I create in EAC are being automatically converted to Dynamic distribution lists (DDL) instead.
Use Case: I am attempting to give membership rights to a DMESG for a shared mailbox. You can grant membership to a MESG but not a DDL.
The membership criteria for the DMESG is:
Users with Exchange Mailboxes AND Department = Accounting (as an example).
The dynamic membership function does work properly. I created the group using EAC as a Dynamic MESG but when the group gets created, it gets allocated as a Dynamic Distribution List instead, and in that state, I cannot make it a member or give it permissions for the shared mailbox.
While I could manage membership manually, I would really rather take the manual process out of the equation.