topic Extension Already Exists in Webex Administration

Extension Already Exists

techie923 — Wed, 04 Feb 2026 19:52:00 GMT

Hello,

So in Control Hub, I removed the device with extension 4400 in Devices and Workspaces, but when I try to re-add the device it's telling me that the Extesion Already Exists when I assign a number??? Where else can this extension be set?

Thank you,

Re: Extension Already Exists

John Steele — Wed, 04 Feb 2026 21:15:13 GMT

I've seen things like this happen during Webex Calling maintenance, the system is just not updating the servers in the backend. Global Service Status

There is maintenance happening as of this message. All the extensions will show up in the numbers section.

Re: Extension Already Exists

techie923 — Thu, 05 Feb 2026 13:32:36 GMT

Awesome, that's for that information