[MovedGoalPosts]

I've had Panda and Avast distributable systems runing on a SBS 2003 server system. Neither gave any messages good or bad when the a/v itself installed from the auto system to the server itself. Only way I could see it was even running was in the consoles of the a/v distribution server.

The problem is that a/v to work effectively embeds itself at a very low level in the operating system. Put SBS with it's host of functions into that and you have a qute eclectic mix.

I don't know what experience you have with SBS, mine is only on 2000 & 2003. But I find that during any reinstall, all sort's of file access permission issues can get overwritten. Make sure that you have a copy of the mailbox files. I'd also recommend you run the exmerge utility to create a true copy of each mailbox as individual files that you can later restore indivudually if you find the complete files won't occur.