I have all of the symtpoms reported in KB938650. I have applied the hotfix and made the registry change, however, the problem still exists. Has anyone had problems with this? Or know of anything else I can try to fix this problem? Thx

Hi, Please confirm whether all the element are the same with KB938650. Eg: Your exchange server is 2003 with sp2. Your event ID is 327. And so forth.Best Regards!

Sorry. The exchange server is 2003 with SP2, the hot fix this article talks about has been applied, the registry entry has been entered, the event id is 327, and I do have users getting delayed notifications when updating or cancelling meetings (which eventually turn into NDR's).