Note: After SSO is enabled on CUCM and IMP, by default all Jabber users sign in with SSO. Administrators can change this on a per user basis so that certain users do not use SSO and instead sign in with their Jabber usernames and passwords. In order to disable SSO for a Jabber user, set the value of the SSO_Enabled parameter to FALSE.
Make sure to system admins users can log in with their LDAP account and have the correct admin access in advance of SSO config.