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When creating a meeting on "SUNDAYS", I am able to create the meeting with no problem. The issue is, when closing and returning to Outlook 2016 for Mac the meeting is corrupt. It changes the time, makes the time zone UTC (Coordinated Universal Time) and the events starts before the scheduled time. I just scheduled another meeting on a Tuesday and I have not seen the issue, which is what makes me think its a "weekend" error - possibly.