A collaboration engineer Is troubleshooting an Issue with Jabber client logins on the Internal network.

A collaboration engineer Is troubleshooting an Issue with Jabber client logins on the Internal network. Users are receiving a certificate error message that Jabber cannot accept the certificate from the server. Users of phone-only mode Jabber clients do not have the same issue. Which two certificates must be regenerated in the initial steps of resolving this issue? (Choose two.)