Originally posted by bnw:
. When the auto-attendant attempts to try the extension, it says "that was an invalid entry". My phone has the correct extension showing in the display.
If you dial an extension form the auto attendant and it gives that error, it means that there is no voicemail box setup for that extension.
Also as mentioned, with a new voicemail box, the extension needs voicemail ID codes setup.
We are starting to go beyond the scope of the user's guide here. Not quite installer level, but at least administrative level, which means that a user's guide won't tell you how to setup a new voicemail box. Thought I would save you the trouble of looking.