Avaya IP Office: Unable To Forward or Transfer Calls Externally

Problem Details:

When trying to set a user’s forward number through a handset, the option to save or complete the forward does not appear. Setting an internal extension works fine and can be set, but trying an external number does not.


Setting a user’s forward number through the IPO Config saves, but does not complete the forward to an external number.


A call comes in to the system and is then attempted to be forwarded to an external number but does not go through and fails.


This is most likely going to be due to the “Inhibit Off-Switch Forward/Transfer” option selected.


Uncheck the “Inhibit Off-Switch Forward/Transfer” option under System | Telephony | Telephony and this should then allow the number to be forwarded/transferred externally.