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Updated:June 3, 2020
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This document describes the solution for Cisco IP Phones 7800/8800 Series registration failure over MRA (Mobile Remote Access) if phone has expired Sectigo/Addtrust root certificate which expried on 30th May 2020.
There are no specific requirements for this document.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Cisco IP Phones 7800/8800 Series fails to register over MRA if phone has expired Sectigo/Addtrust root certificate which expried on 30th May 2020 and Expressway has signed it certfictate from Sectigo/Addtrust CA.
Per 12.7 firmware Certificate Authority Trust List, Trust list has expired Sectigo/Addtrust certificate on IP phone trust store.