How to Remove the Last Exchange 5.5 Server

Check the Site Folders
Exchange uses several hidden system public folders called the site folders. The site folders are

• the Offline Address Book (OAB) folder, which generates an offline copy of the Global Address List (GAL) for remote users to download
• the Schedule+ Free/Busy folder, which Outlook clients use to query availability information when creating appointments through Outlook
• organization forms, which users use to publish Exchange forms they create with the Exchange Forms Designer

The Exchange Setup program creates these folders on the first server in a site at installation. Although the server you're removing might not have been the first server in the site, an administrator might have transferred the site folders to this server because someone subsequently removed the original first server in the site. You can view site folders through Exchange Administrator under Folders, System Folders. . . .