Hi KwbMitel,
Instead of choosig the Admin's mailbox or the Auto Attendant - looks like I choose the wrong mailbox - the operator(0)!
I manually went into the optiopns - 8, 8, and choose 0 to disable. Worked fine.
However, I am not sure why other user's mailboxes were affected on a particular day.
I performed the same steps above from the TUI on the few user/employee mailboxes as well and all is fine so far.
Thanks for your help.
SP