I was attempting to resolve a problem with "Unable to Create or Rebuild Default Offline Address List" and followed the instructions in "275171 (http://support.microsoft.com/kb/275171/EN-US/) XADM: How to Reset System Folders on an Exchange 2000 Server" Now I have the following problem and error with expanding Public Folders in ESM. The fix is below, can someone please help with a step-by-step on how to resolve this please, please !! I dont know how to ? Add or remove the correct host headers to Exchange virtual server in Internet Information Services (IIS) Manager " ============================================ Error ID number: c007274c Error Message Facility: Win32 A connection attempt failed because the connected party did not respond after a period of time, or established connection failed because connected host has failed to respond. Possible Causes ? Incorrect host headers defined on clustered virtual server. Troubleshooting ? Add or remove the correct host headers to Exchange virtual server in Internet Information Services (IIS) Manager.