I have a customer who has CallManager 3.3 with Unity 4.0(3) for Exchange. The Unity uses an Exchange 2003 server as the off-box message store.
I am upgrading the customer to CUCM 7.1 and moving them to Unity Connection 7.1 but it will be a few weeks before this is completed.
The customer urgently wants to upgrade Exchange to 2007 which is not supported by their version of Unity.
I understand that if Unity cannot reach its Exchange partner server messages will be stored on the Unity server.
I am wondering whether it would be possible to use the existing Unity 4.0(3) server with no connection to Exchange for a few weeks until we are ready to upgrade the IPT system.
If I do this will Unity store messages and set phone MWI's correctly?