Reserved Extensions Suffixes

Question

Accepted Answer

Users have a primary extension and can have up to 9 other alternate extensions suffixed with a letter. For example, User 1000 may have a primary extension of '1000' but can also have extensions such as '1000a', '1000b', and '1000c.'
Some extension suffixes are reserved for various systems' usage. This article is to track extension suffixes that we recommend NOT deploying.
Suffix
Use case (reserved for)
mReachUC Mobile / UC Client MobilenReachUC ConnectortMicrosoft Teams IntegrationwUC Client Web / Progressive Web App (PWA)