I just bought an Xserve, set up a software raid (mirror) of the two hard drives, installed Leopard server, updated to 10.5.4 (this was yesterday morning). I selected "standard", started setting up Mail, added some users and groups, tested some of them to see if they worked. Then I installed 10.5.5 today ("great, it's out before we're using the server!")...and now the local admin user I created is GONE. Weird. I was able to log in as "root" and the admin password I had set. I opened up Server Preferences. No users. No groups. Tried testing mail on a client again -- doesn't work anymore. Where the heck did everything go? Is this standard practice for OS X Server updates to clear out everything?? (this is my first Xserve and my first experience with OS X Server). ???