I have 60 SX20 on Branches, and CUCM 11.5 and CUP 11.5, Expressway 12.7 that Oauth Authentication is in disable state.
the cucm cluster security mode is mixed mode.
the problem is that when i want to register sx20 through mra to cucm the following error that is in attachment is shown and when i change the procotol from tls to tcp the error is "Cannot Get Config from edge server"
another thing that i found in cisco log analyzer tool is that, the expressway-e cannot verify sx20 certificate. (why the expressway is validating sx20 certificate, is there anyway that i can't disable client certificate validation on expressway.)
attach the expressway-e/c log on the meesage.
appreciate if someone could help me to find the cause of this issue.
First, you need resolve NTP issue from your screenshot. You can't use TLS whithout correct NTP. Does your MRA mode work early ? May be for jabber ? Do you add certificate to SX20? Does your SX20 has encryption key ?