I have a user who is experiencing a strange, annoying and embarrassing issue
where invitations of a few past, completed meetings (as in 3 months past!)
are being sent out to invitiees, including internal attendees and our
customer invitees up to several times a day.

She is also receiving reminders over and over of these meetings, though she
says she already dismissed them in the past, not just snoozed them.

This doesn't happen on all meetings.

I have had her launch Outlook with the /cleanreminders switch, as
recommended in another , and I also had her trash and recreate her .ost file.

Any suggestions or help is much appreciated...thanks in advance!