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Room calendar suddenly empty

anstifter 1 Reputation point
2022-07-11T10:01:26.617+00:00

Hello!

We have a room calendar in a hybrid environment that up until last Wednesday was filled with several appointments.

When a user (delegate, send on behalf permission) set up a new meeting he discovered that all previously booked appointments are missing.

Since the mailbox is set up as a ressource there doesn't seem to be a way to find any items to restore. One admin gave himself full-access permission, but couldn't find any items to restore.

Is there a way to find

a) the missing items &
b) out what happened?

Kind regards

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,503 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,999 questions

2 answers

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  1. T. Kujala 8,706 Reputation points
    2022-07-11T10:53:05.187+00:00

    Hi @anstifter ,

    Admin can perform the mailbox audit process.

    https://learn.microsoft.com/en-us/exchange/search-the-mailbox-audit-log-for-a-mailbox-exchange-2013-help?view=exchserver-2019

    Hopefully, it helps to find the root cause.

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  2. Jame Xu-MSFT 4,176 Reputation points
    2022-07-12T06:36:42.727+00:00

    Hi @anstifter ,

    After searching , there may be the following situations:

    1. Scheduled appointments do not disappear, it is just that some users are not visible, and that is just a possibility, because that is the case when most users have appointments disappear.
    2. Users who have a mobile terminal and turn on sync settings may have this problem:
      https://www.nucleustechnologies.com/how-to/troubleshoot-calendar-appointments-missing-in-outlook.html
      Microsoft provides third-party contact information to help you find additional information about this topic. This contact information may change without notice. Microsoft does not guarantee the accuracy of third-party contact information.
    3. All dates are lost, which is relatively rare. You can refer to the documentation below:
      https://www.datarepairtools.com/blog/outlook-calendar-appointments-missing/
      Microsoft provides third-party contact information to help you find additional information about this topic. This contact information may change without notice. Microsoft does not guarantee the accuracy of third-party contact information.

    Alternatively, If you enable audit logging for the mailbox, you can check the mailbox audit log to see if someone cleared the appointment.

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