After you modify a default access control list (ACL) in Microsoft Outlook (for example, when you grant Read access to another user on your Calendar), if you use Microsoft Windows Explorer to examine the ACL in the Exchange installable file system (IFS) share, you may receive the following error message:
The permissions on Calendar are incorrectly ordered, which may cause some entries to be ineffective. Press OK to continue and sort the permissions correctly, or Cancel to reset the permissions.
If you click
Cancel, and then click
OK, the ACL becomes inaccessible. If you try to set additional permissions in Outlook, you receive the following error message:
The modified permissions could not be saved. The client operation failed.