Source:  eDirectory Administration Snap-in

Explanation:  The system was unable to complete the request to log out.

Possible Cause:  The servers in the specified tree might have gone down, or your connection to a server in the tree might have been lost.

Action:  If you are trying to log in to the same tree as a different user and your connection was lost, restore your connection to a server in the tree and then retry the operation.

If you are just trying to log out of a tree and your connection was lost, you don't need to do anything, since you are already disconnected from the tree.