Calendar items disappearing randomly

GoodResource 376

Hi,

We have a situation where one of our executives calendar items disappearing randomly. It is not happening for all items but some. When we check audit logs, it says hard delete operation performed by his assistant but it was not done. When we checked search mailbox, we found those items in "purges" folder. His assistant has got delegate access but no such action was performed. an user cannot put items in the purges folder by themselves. any help would be greatly appreciated.

Yuki Sun-MSFT 40,931 Reputation points

2023-01-23T08:37:04.7633333+00:00

Hi @GoodResource ,

How are you doing with this issue? Is there anything you would like to update? Thanks!

1 answer

Yuki Sun-MSFT 40,931 Reputation points

2023-01-16T02:43:51.9033333+00:00

Hi @GoodResource ,

Does this issue affect the assistant's own calendar?
Do these disappeared items have anything in common?

Based on my experience, I'd suggest checking if the assistant has any calendar related third-party add-ins enabled in Outlook clients. If yes, you can try disabling them and monitor some time to see the result.

Besides, you may consider removing the assistant's permissions and then assigning permissions again to check if there would be any difference.
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GoodResource 376 Reputation points

2023-01-16T07:45:26.64+00:00

@Yuki Sun-MSFT Hi, thanks for responding. No the issue doesn't seem to be happening for the assistant. No such 3rd party add-in was found. The only thing which we can see is the meetings are updated by the organizer which are getting deleted completely. Other people who are invited in the same meeting still got the same invite intact on their calendar but not him.

Yuki Sun-MSFT 40,931 Reputation points

2023-01-19T08:09:43.3566667+00:00

Hi @GoodResource ,

The only thing which we can see is the meetings are updated by the organizer which are getting deleted completely.

Have you checked if there's any potentially relevant inbox rules created in the assistant's mailbox? Especially those with the action "permanently delete it".

GoodResource 376 Reputation points

2023-01-24T09:59:51.8966667+00:00

@Yuki Sun-MSFT No there are no rules or any auto archive settings or anything as such. He has a delegate. The moment delegate accepts, it seems the invite gets disappeared. For some it comes back. For some it never does. And we checked it goes to "Purge" folder as hard deleted.

Yuki Sun-MSFT 40,931 Reputation points

2023-01-26T01:23:21.13+00:00

Hi @GoodResource ,

As mentioned earlier, have you had a chance to try removing the delegate and add it again to see the result?
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Calendar items disappearing randomly

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