Any way to recover previous IPs for extension?

#1

I added a second phone to an extension without first updating the concurrent line to 2. So the phone I added is there, but the user’s office phone is not. I should have taken a picture or backup first.

Is there any way to find the IP of her office phone through the admin portal?

#2

if you do not enter details, server used, ip phones etc … with exact description of the problem,
difficult to answer you