Yes, I did run the domainprep at the beginning -- the server has been running for well over a year & was a new install (no upgrade from Exchange 5.5) -- have been living w/ the error since it hasn't been creating any issues -- would just like to tie the loose ends up. Yes, I have checked the system attendtant service and it is ok. I do have some calls on an account that I can use to call Microsoft and am tempted to do that -- at the very least, may learn something :-) Lee Lee Ann, One other question; you made reference to never having run domainprep? Did you run it during your initial preparation to install E2K? Ken -----Original Message----- From: Lee Swanson [mailto:swanson@xxxxxxxxxx] Sent: Sat 3/1/2003 9:17 PM To: KEN MORRIS Cc: Subject: Re: [exchangelist] Event ID 9543 Exchange 2000 Ken; I had found the below items -- and sp were reinstalled and the computer account is a member of the "Exchange Domain Servers" I have been toying w/ the idea of running the Exchange setup again w/ the /domainprep switch. Have never done this. Will this create any problems w/ the current database/mailboxes etc.? Do I need to reapply the SP after this? Thanks.