In Active Directory, domains are case insensitive. In CMCC they are case sensitive. An AD domain indeed occurs in different cases in CMCC, depending on how it has been obtained or configured. This led to some failing comparisons of logically equal domain values. Now, the ActiveDirectoryUserProviders normalize the domains to lowercase, so that they appear consistently in CMCC.

If you have configured your AD domain with uppercase characters (EXAMPLE.org) in jaas.conf, you must change it to lowercase, otherwise AD users won't be able to login.

(CMS-12913)