We have a Win2k environment w/ exchange2000. On one of our boxes we are seeing the following issue: User A will allow user B to view and edit their calendar. User B will now be able to view user a's calendar. Then at some point the permissions dissappear and user B can no longer view or edit user A's calendar and noone has changed or touched the permissions. We have since excluded the IFS mapped drive M: from any and all Virus scans and backups. We have even included in the exclusion the Exchsvr folder. We continue to see the permissions dissapear every night. Further and even stranger is the default user with it's permissions dissapears as well and has to be re-added before we can re-enable any user to view/edit user A's calendar. Thanks,
