0365 calendar invite sending multiple (hundreds) of acceptances

After the iOS upgrade to 15.1 upgrades, we are seeing instances in which calendar invites are generating multiple 'acceptance' responses. This is happening for o365 mailboxes. Also, some of the old meetings now generate nonstop 'acceptance' responses.

I noticed in another forum that this is a known issue. But it was mostly related to iOS 13 upgrades.

Turning calendar sync on/off resolves the issue. I am supporting an organization with multiple users and would like to prevent this from happening if possible - as we allow users to upgrade to the latest iOS themselves.

iPhone 13 Pro

Posted on Dec 10, 2021 11:39 AM

Top-ranking reply

dollabill101

Level 1

8 points

Posted on Feb 15, 2022 11:59 AM

I've been dealing with this issue on and off for the past few years at different places i've worked at. I feel like it's increased more this past 6 months where i'm at now. Yes this happens only when the user is using the native iphone email/calendar app and accepts a meeting from the iphone. Workaround fixes are turning off the calendar sync from settings, reboot phone and re-enable it or If the user can use the iOS Outlook app. Pretty frustrating this is still occurring. It feels like it's a hit or miss when accepting from an iphone.

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0365 calendar invite sending multiple (hundreds) of acceptances

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