Troy, sorry for not responding sooner, but I've been away on business and pleasure for a while... I don't know you'll gain anything (migration-wise) by upgrading the OS on the Ex 5.5 box. If it's causing other problems, there's certainly no reason not to (just be sure to follow MS's recommendations concerning this). Have you migrated your network to AD yet? Greg -----Original Message----- From: Troy Krisher [mailto:TKrisher@xxxxxxxxxxxxx] Sent: Tuesday, July 27, 2004 5:08 PM To: [ExchangeList] Subject: [exchangelist] RE: Exchange upgrade http://www.MSExchange.org/ Greg, Thanks for the input. I have been working on setting up test environments, but NT 4.0 is being a little difficult. Do you think it would be wise to upgrade the OS prior to proceeding with the exchange upgrade? I figured that this would help with the manageability of the server itself and less blue screens as a result as well.