Meetings Disappearing From Outlook Calendar. I have the same problem with the new version of outlook, where meetings randomly disappear from the main calendar window on my desktop, although they are still. Go to your trash, find the calendar that's deleted and undelete it.
In addition, i found a thread mentioned the similar issue, which introduced when a user uses microsoft exchange activesync on a mobile device to modify a recurring meeting,. Try resetting the view where it disappears but you may need to restart outlook.
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