Using Classic Outlook on Windows for personal email, calendar, and contact management
I found this solution online and it seems to work for me: Disable the social connector COM add-in.
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When I open any appointment in outlook Calendar I have to save it before closing if I have locked my PC in between. Even If I did not change anything (applies to any invite also empty freshly created ones and also applies when outlook is started in safe mode + also applies on different PC / different account)
[ Outlook wants me to "save changes". I havent noticed a problem with forwarding or replying.
did not work for me
or me. Back to the drawing board.
Go to File -> Options -> Calendar -> Scroll to the bottom and uncheck "Show Meeting Insights"
I literally just fixed this issue today. I've had it for multiple years, and finally got fed up enough to do some research. I was aided by this suggestion "Go to File -> Options -> Calendar and unchecking Show weather on Calendar". I couldn't find a weather option, but the Insights option intrigued me, since it's a more recent addition. I was not expecting it to work but was very pleased when I found that it did. I hope this can solve someone else's problem.