Forum Discussion
Outlook 365 Group Calendars disappear
I have a group of users running 2 versions of outlook. 2303 Build 16227.20280 and Version 2303 Build 16227.20258 are running into the same issue where some of their group created calendars are disapp...
- Microsoft published this advisory (EX540503) yesterday:
Title: Some users may be unable to view or access group calendars and email messages in the Outlook desktop client
User impact: Users may be unable to view or access Microsoft 365 group calendars and email messages in the Outlook desktop client.
More info: Affected users are part of a Microsoft 365 group and are on versions 16.0.16222.10000 or higher, including the latest February release channel. Some affected users may also notice that impact self-resolves after some time, although impact may also reoccur at a later time. These users may also be unable to perform one or more of the following actions in the Outlook desktop client:
- Add or access the group mailbox
- Add or access the group calendar
- Add, remove, or edit group members
- Changes to mail items, such as marking as read, archiving, or moving email to other folders.
Current status: We've identified that a recent service update is incorrectly triggering an indexer to remove specific values within the Outlook desktop client for some users, resulting in impact. We've developed a fix to repair this issue and are validating it within our internal test environments to ensure all affected scenarios are accounted for before proceeding.
Scope of impact: Impact is limited to a small number of users on versions 16.0.16222.10000 or higher, and are attempting to access or perform various Microsoft 365 group related actions in the Outlook desktop client.
Start time: Tuesday, March 28, 2023, 6:38 PM (11:38 PM UTC)
Root cause: A recent service update is incorrectly triggering an indexer to delete specific values within the Outlook desktop client for some users, resulting in impact.
Next update by: Wednesday, April 19, 2023, 2:00 PM (7:00 PM UTC)
This is not directly related but one of our customers recently received 2303 and in their Groups section within Outlook they would either entirely disappear or the contents of the mailboxes would disappear. Restarting Outlook and/or the computer would cause them to re-appear then disappear again. I tried new e-mail profiles, reinstall of M365 and using the scrubbing tool/vbs scripts none of which fixed the problem. I was able to replicate this behavior on my own computer and found that the prior version 2302 did not have this problem. I rolled back to 2302 by switching to the Monthly Enterprise Channel.
