can't view Outlook calendar invitations

Meeting invitations from both Outlook and Gmail are processed by Exchange Online. If the invitations are being received but are not appearing in the calendar, the first step is to establish whether Exchange is delivering them correctly or whether they are being removed or processed automatically.

Check the following:

1. Outlook on the web: Sign in at outlook.office.com and check whether the invitations appear there. This helps determine whether the issue is with Outlook itself or the mailbox.
2. Inbox and mailbox rules: Check Deleted Items, Junk Email, inbox rules and any forwarding settings that could be moving or deleting invitations.
3. Calendar settings: In Outlook, go to Settings > Calendar > Events and invitations and check how invitations are being handled.
4. Exchange Online: An administrator can run a message trace in the Exchange Admin Center to confirm whether the invitations were delivered, rejected or redirected.
5. Mailbox permissions: Check whether another user has delegate access to the calendar and whether invitations are being sent to or processed by that delegate.

If the invitations are confirmed as delivered but are still missing from the calendar, the next step is to investigate the mailbox’s calendar-processing configuration and relevant Exchange Online diagnostic logs.

Important: Receiving a meeting invitation does not always mean it will immediately appear as a calendar event. This depends on the mailbox’s invitation-processing settings.

Microsoft Entra ID itself does not manage meeting invitations. The relevant service for investigating this issue is Exchange Online.

Could you please clarify whether the invitations arrive in your Inbox but do not appear in the calendar, or whether the invitation emails themselves are missing? Also, is the receiving account an Outlook.com/Hotmail account or a Gmail account configured in Classic Outlook? If the invitations arrive in your Inbox, what happens when you open one and select Accept? Finally, do the missing meetings appear when you access the same account's calendar through its web interface (Outlook.com or Google Calendar)?