You might do a search...this has been discussed....
My post to an older discussion:
It should be noted that if you upgrade to 6.0, all your XP and 2k systems will 'cut off' from the domain. If the user has logged in prior to the 6.0 upgrade, they can login using the cached profile (this is allowed 10 times by default). If a new account is created on SME 6, that user can't log in. This is a serious problem as it will bring down an entire site in due time if SME is a PDC.
I was able to get the systems to rejoin the domain after putting them in a workgroup. I realized you can not change the system name when you attempt to join the domain or you will get the known user error.
I did this in a test environment with 2 fresh machines..one 2k, the other XP. Both w/ all service/security fixes. I joined them to a fresh SME 5.6u6 server. I then upgraded the SME server to 6.0. They then lost contact. Is this due to a newer samba version? I can't believe a bug this serious made it to final. I guess this final is should be 6.0dumpped instead of 6.0final. If I had applied this upgrade in a production environment, I would have spent hours if not days redoing each client membership.
My webmail also no longer works on the test server. The fixes in the forum allow me to log in, but the Memo, Calendar, and contacts crap out with an error.
SME 6.0 SHOULD BE THOURGHLY TESTED. YOU MIGHT BE SURPRISED WHEN YOU LEARN WHAT WILL BREAK IF AFTER UPGRADING.
I think I will wait to see if SME survives and adopts a new distro before upgrading my 5.6 servers in production. Did 6.0b3 have these issues? What changed? Anyone find a good replacement for SME 5.6...or will this community pull through these problems?
ryan