I've got a Windows Server 2003 SP2 server running Exchange 2003 SP2. I had to copy a 59GB .edb file from some internal disk to a DAS disk. About half way through the copy (which was initiated through the GUI), Windows reported the following error: Error Copying File or Folder Cannot copy users: Insufficient system resources exist to complete the requested service. I logged into another server (Server 2003 x64 SP2), copied the file across the network, then back to the Exchange server. There was plenty of space on the DAS. What gives? Thanks

this error usually shows when the pool memory is used up. while this article discusses backup and not copying, the info to track usage and what values you can try to influence via registry are the same. http://support.microsoft.com/kb/304101/en-us