[cisco-voip] Mask caller ID of some message senders in Unity Connection Single inbox

[Ray Maslanka]

Gents,

Running CUCM and a SIP integration to Unity Connection with Single Inbox to
O365.  Normally if a CUC user is forwarded to a voice mailbox of another
CUC user, the Identified User Messaging feature provides the name and
number of the caller in the Outlook message.  The ask is now to have the
numbers of a small subset of users masked in the Outlook message when they
leave voice messages.

The use case is when executives, support staff, call center agents, etc.
want to make calls and leave voicemail but avoid providing direct call back
information.  Caller ID is masked currently from phone to phone using
Calling Party Transformation Patterns in CUCM, but this doesn't mask caller
information when the call reaches Unity Connection.

The Remote Party Id on the integration SIP trunk can be removed to make all
callers over that trunk unknown, but we only want a small subset of users
to be masked.  Alternatively, the Identified User Messaging feature can be
turned off to prevent name and number in the message, but that is system
wide.

Does anyone have a decent solution to mask the caller ID of a relatively
few users in Unity Connection Single Inbox messages?
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