I was hoping someone would be able to verify if the following is possible.
Our organization is partialy absorbing a smaller organization.
We currently have a full VoIP setup with the following:
Call Manager: 18.104.22.16801
Unity: 4.2 Build 4.2(1)
The organization we are absorbing has the following:
Call Manager: 22.214.171.12400
Unity: 4.2 Build 4.2(1)
Exchange 2003 (going away)
Under the "merge" all of their users, computer and servers will be brought into our Active Directory structure. Their exchange users will be brought into our exchange enviroment. Their phone numbers are in a different area code, the last four digits have no overlap with ours (thankfully).
On the table there are 3 different proposals, the last of which is outside of the scope of this question. I believe that either of the following two options should work based on the documentation I've looked over but would love to hear a confirmation from someone that it is indeed the case.
Option 1 (The prefered method)
Their entire phone infastructure stays in place. Users are placed into our exchange enviroment. Their Unity would point to our exchange, This would effectively have two different Unity systems (ours and theirs) pointing to the same Exchange box. The same situation would occur for their Rightfax box.
So alll in all 2 Unity and 2 Rightfax servers pointing to 1 exchange box. The callmanagers would be left out of the equation. Their users would remain seperate from ours for all phone purposes aside from exchange voicemail and fax account locations. From my understanding of the documentation, this would effectively create two seperate voicemmail stores on the exchange server
I guess aside from confirming that exchange can support two different unity boxes, the other issue I'm running into is finding the location where you change the exchange partner server unity is looking for.
Option 2 (Secondary Proposal)
Their Call Manager Stays in place. Users are placed into our exchange enviroment. Their RFax and Unity boxes are removed. All users faxes and voicemail are run off our RFax and Unity boxes.
This I'm almost 99% positive should be an issue but would require a bit more backend work, a second cluster integration on our Unity and RFax as well as an extensive reconfigure of their voicemail settings in call manager.
I really appreciate any confirmations from people who have gone through similar mergers, particularly for the Unity part.