Exchange Unified Messaging / Other Extensions (4298612)

Active Roles (ARS) can perform basic administration of 'Exchange Unified Messaging', however, there doesn't appear to be any method by which "other extensions" can be added to a user's Exchange Unified Messaging config:

Whereas, it is possible through Microsoft Exchange's own Admin Centre:

WORKAROUND:
None

STATUS:
Enhancement request number “761797" has been submitted to Development for consideration in a future release of Active Roles.