No email invite being received

Question

No email invite being received

Paul Harris 0

I have a user who is finding when being sent calendar event requests, no email is being received and the request goes into their calendar, waiting to be replied.

I have checked calendar settings against my account and they match.

I receive an RSVP with requests from the user affected.

Both of us use Outlook New (M365).

I have gone back into outlook classic and the option to automatically accept event requests is unticked but there isn't a option for this in outlook M365 client or web.

Help, advice or suggestions? all the suggestions from google keep mentioning Outlook Classic.

Paul Harris 0 Reputation points

2026-02-18T11:49:52.1866667+00:00

The user has no delegates for the calendar, no rules set up, not in junk or deleted items folder, it's very strange, any help would be appreciated.

3 answers

Your answer

Paul Harris 0 Reputation points

2026-02-18T11:49:52.1866667+00:00

The user has no delegates for the calendar, no rules set up, not in junk or deleted items folder, it's very strange, any help would be appreciated.

Answer 1

Matthew-P 11,485 Microsoft External Staff Moderator

Hi Paul Harris,

Welcome to Microsoft Q&A Forum! Have a good day and I hope you're doing well!

Thanks for your update. If there are no delegates, no visible rules, and the item isn't in Junk/Deleted, that is indeed very strange. Since the client-side checks are clean, we need to rely on the server logs to see exactly what happened to that message during transit.

Could you please run a Message Trace in the Exchange Admin Center for one of the specific meeting invites that "disappeared"?

Once you have the trace results, please drill down into the Message events / Details section to check two specific things:

Delivery Status & Location: Does the status confirm "Delivered"? If so, does the trace specify the target folder (e.g., Inbox, Calendar, or Conversation History)?

Processing Events: Look for any "SET" or "MOVE" events right before delivery. Sometimes a hidden/corrupted inbox rule or a transport rule can move the message to the calendar or delete the notification silently, even if it doesn't appear in the Outlook rules list.

This trace will definitively tell us if the email reached the Inbox and was moved, or if it was intercepted/dropped before it ever landed.

For more details on how to interpret the trace results, you can refer to the Microsoft documentation here: Message trace in the new Exchange admin center in Exchange Online

I hope this helps narrow down the cause, at least partially. Let us know what the delivery path looks like. If I was unclear on any step or if I’ve misunderstood anything, please feel free to reach out anytime.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Matthew-P 11,485 Reputation points Microsoft External Staff Moderator

2026-02-19T13:20:41.2533333+00:00

Hi Paul Harris,

Hope you found my respond helpful. if you have any update on this, feel free to let me know.
Paul Harris 0 Reputation points

2026-02-19T14:00:43.7566667+00:00

Hello, we've checked the account in exchange admin and all the meeting requests are being deleted due to a mailbox rule, waiting to have access to the users device to check again.

Thanks for your help so far.
Paul Harris 0 Reputation points

2026-02-20T10:55:51.9066667+00:00

We cracked it, invites were going to a delegate only, have changed this and both the user and delegate receive message invires, but the option to change this - can only see in outlook classic, not outlook new?
Matthew-P 11,485 Reputation points Microsoft External Staff Moderator

2026-02-20T14:54:16.32+00:00
Hi Paul Harris,

That is great news! I am glad you were able to pinpoint the root cause to the Delegate configuration.

Regarding your question about Outlook New (and Outlook on the Web): You are right that the "Delegates" tab as we knew it in Classic is gone, which causes a lot of confusion.

However, the option is technically there, just tucked away. For future reference, here is the path in the modern interface:

Go to Settings (Gear icon) > Calendar > Shared calendars.

Under the "Share a calendar" section, click the drop-down menu to select the mailbox's calendar.

Click the Share button (next to the drop-down).

A window will pop up showing the list of people. Here is where you can see the Delegates and modify their permissions.

I hope this helps clarify the new layout! If you need anything else, feel free to reach out.
Matthew-P 11,485 Reputation points Microsoft External Staff Moderator

2026-02-23T06:09:09.1333333+00:00

Hi Paul Harris,

Just wondering if there’s been any progress on this thread.

If my initial answer has been even partially helpful, please consider marking it as “Accepted Answer” so others facing similar issues can find it more easily.

If you still have any concerns or questions, please feel free to reach out anytime. I'm just here to assist in whatever way works best.

Best regards.

Answer 2

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Answer 3

It sounds like the user is experiencing issues with receiving email invitations for calendar events in Outlook. Here are a few suggestions to troubleshoot this issue:

Check Delegate Access Settings: Ensure that the user does not have Delegate Access enabled with the delivery option set to "My delegates only." This setting can cause meeting requests to be routed only to delegates and not to the user's inbox. You can check this setting in the Outlook client under Delegate Access options.
Message Tracking: If the issue persists, consider running message tracking on the Microsoft Exchange Server for the specific user. This can help identify if the meeting requests are being sent and if there are any errors in delivery. Look for any messages that indicate the requests are being deleted by mailbox rules.
Mailbox Rules: Check if there are any mailbox rules that might be affecting the delivery of meeting requests. Sometimes, rules can inadvertently move or delete incoming meeting requests.
Junk Mail Filtering: Ensure that the meeting requests are not being filtered into the Junk Email folder. The user should check this folder to see if the invitations are being misclassified.
Outlook Settings: While you mentioned that the option to automatically accept event requests is not available in Outlook M365, make sure that all relevant settings are configured correctly. Sometimes, settings can differ slightly between Outlook versions.

If these steps do not resolve the issue, further investigation may be needed to determine if there are any underlying issues with the user's mailbox or account settings.

References:

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No email invite being received

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