IP Office Server Edition or 500V2, all releases.

Case 1:

• 4 phones will not register, phone says "Extension in Use"
• In the configuration this error appears next to the Extension number of the users-Solution Error: "User extension must be unique across SCN."
• Extensions that had been working in the past have been unable to register with the IP Office, and say "Extension in Use."

Case 2:

• New User/Extension created for a newly acquired 9600 phone.
• When trying to register the extension, the phone shows: "Extension in Use."

Tip: If trying to log a Digital extension into an IP Phone, system monitor will show:
16:46:47 1773545340mS H323Evt:    RRQ --- Cannot create an extension(Exten809 809) or the extension number is allocated to a non-IP extn

Case 3:

• When Extension 88xx logs in extension 8xxx gets logged out and shows: "Extension in Use"
• Extension 88XX was used as analogue phone previously. Once changed to IP Phone the issue occurred.

Case 4: Issue affecting 2 users when user A is logged in on phone and then user B logs in it logs out user A

Case 5: E129 ip phones get stuck with NoUser logged in.

Case 7: After rebooting some users who normally hot desk to different phones are unable to login.

Case 8: Phones Will Not Register/Login, Phone Says "Extension in Use" I am running R 11.0.0.2. I get to a login prompt and enter my credentials and the phone goes to "Extension in Use".

Case 9: Log off buttons not working for 3 users

Case 10: 1 User shows logged in from 190+hours