Consider the following scenario:
Additionally, you may observe the following errors logged in the event log on your Exchange UM server:
- You upgrade to or install Microsoft Skype for Business Server 2015.
- Your Exchange Unified Messaging (UM) Auto Attendant (AA) contact is hosted on a Skype for Business Enterprise Edition Pool or Standard Edition server.
- An incoming PSTN (external caller) call reaches the UM Auto Attendant and is blind transferred to a Skype for Business user or to an RGS that does not have a dedicated DID number.
"Call cannot be transferred, returning to the main menu."
Internal Lync users can still successfully transfer calls to the user or RGS. Additionally, you may observe the following errors logged in the event log on your Exchange UM server: