Jabber login fails RTMT

[robert.tabor]

Which logs from which servers would be useful in viewing failed attempts to log in to Jabber?

[TomMar1]

I would start with generating a problem report from the Jabber client itself. 

[Nithin Eluvathingal]

As @TomMar1 mentioned, you should start taking the logs from Jabber first and run it on CSA tool. You will get more informations. 

Is it Over MRA or  Local  ?

[Shalid Kurunnan Chalil]

Hi Robert,

1. If it a on-prem Jabber,
   Jabber Problem Report: you get almost every piece of information required to troubleshoot the issue from here itself. 
   Call Manager: Cisco Tomcat, Event viewer application and system logs 

• if it MRA setup
  Jabber problem report 
  Expressway E diagnostic logs
  Expressway C diagnostic logs
  Run the analysis of these logs on to Cisco C collaboration solutions analyser: https://cway.cisco.com/csa/ 

the following link may be helpfull further: https://www.cisco.com/c/en/us/support/docs/unified-communications/jabber/212471-jabber-login.html 

Regards,
Shalid