Microsoft small business knowledge base

Article ID: 223093 - Last Review: February 22, 2007 - Revision: 3.2

This article was previously published under Q223093


When you view the properties of an encrypted file or folder, you may notice that the files are not compressed even though the volume is set to be compressed. If you choose to compress a file using Windows Explorer interface, you may not be able to do so.


NTFS file compression and file encryption are mutually exclusive because of the way NTFS compression is performed. You can use only one of these options at a time on a file.

NOTE: To change a file that is encrypted to compressed, you must have access to the private key (Recovery agent) associated with that file to decrypt the file before it can be compressed.

  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Datacenter Server
kbinfo KB223093
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