In my current 2003 org I went into ADSI Edit and changed warning, prohibit send and prohibit send/receive on individual mailboxes to a value above the 2GB gui limit per the KB below. http://support.microsoft.com/kb/930366 My question is when I install 2007 and move mailboxes to it will I have a problem with these users? I know 2007 allows for larger limits but since this is something done in ADSI Edit and not the gui I just want to be sure it will not break anything. I know the gui just edits AD as does ADSI Edit but my hesitation is did Microsoft limit it for a reason and again will it cause issues when going to 2007?

I think I answered this question in another forum you posted to, but to repeat the info here, the 2GB limit is a GUI limitation and I therefore can't see how it will affect users.