Messaging Server: Upgrading to 6.3 and Potential Admin ID Problems
By Joesciallo-Oracle on Nov 16, 2007
The basic problem lies with a change in Messaging Server 6.3. Prior to 6.3, Messaging kept configuration information in the LDAP directory server under o=netscaperoot. By default, the definition of the admin account was stored in that DIT. If you also had a user defined in your main users/groups DIT with uid=admin, then Messaging would find and use that entry instead of the one in the configuration DIT. As of 6.3, Messaging no longer uses the o=netscaperoot configuration DIT.
Kelly Caudill has authored an article on this topic and how to take care of the issue if it arises for you. Get the article here.