Problem with calendar and Teams meeting invitations.

Question

Hello,

I have a personal Outlook.com account and I am experiencing a problem with calendar and Teams meeting invitations.

Symptoms

• Normal email messages send and deliver successfully.
• Calendar invitations and Teams meeting invitations do not reach attendees.
• The issue affects all recipients, including another Outlook.com account that I own.
• The event is successfully created in my own Outlook calendar after I click Send.
• Invitations appear in my Sent Items. I can see Teams meeting invitations being generated and stored in Sent Items.[PII: Removed]

Troubleshooting already completed

• Tested Outlook desktop.
• Tested Outlook on the web.
• Repaired Outlook profile.
• Created a new Outlook profile.
• Signed out and back into Outlook and Teams.
• Normal email delivery works correctly.
• The problem occurs regardless of device.

Test results

• Sending a regular email to another Outlook.com account works.
• Sending a calendar invitation to another Outlook.com account does not arrive.
• Sending a Teams meeting invitation to another Outlook.com account does not arrive.
• The meeting remains on my own calendar after sending.

Request

Could you please investigate whether there is an issue with the Outlook.com calendar invitation service, meeting invitation delivery, or a restriction/corruption associated with my Microsoft account?

Please check:

• Calendar invitation delivery logs.
• Teams meeting invitation delivery.
• Outlook.com calendar service health for my account.
• Any account-level restrictions affecting meeting invitations.

Thank you.

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I would also mention to the support agent that you've reproduced the issue between two Outlook.com accounts, which is the strongest evidence that this is not a recipient-side problem.Hello,

I have a personal Outlook.com account and I am experiencing a problem with calendar and Teams meeting invitations.

Symptoms

• Normal email messages send and deliver successfully.
• Calendar invitations and Teams meeting invitations do not reach attendees.
• The issue affects all recipients, including another Outlook.com account that I own.
• The event is successfully created in my own Outlook calendar after I click Send.
• Invitations appear in my Sent Items. I can see Teams meeting invitations being generated and stored in Sent Items. [PII: Removed]

Troubleshooting already completed

• Tested Outlook desktop.
• Tested Outlook on the web.
• Repaired Outlook profile.
• Created a new Outlook profile.
• Signed out and back into Outlook and Teams.
• Normal email delivery works correctly.
• The problem occurs regardless of device.

Test results

• Sending a regular email to another Outlook.com account works.
• Sending a calendar invitation to another Outlook.com account does not arrive.
• Sending a Teams meeting invitation to another Outlook.com account does not arrive.
• The meeting remains on my own calendar after sending.

Request

Could you please investigate whether there is an issue with the Outlook.com calendar invitation service, meeting invitation delivery, or a restriction/corruption associated with my Microsoft account?

Please check:

• Calendar invitation delivery logs.
• Teams meeting invitation delivery.
• Outlook.com calendar service health for my account.
• Any account-level restrictions affecting meeting invitations.

Thank you.

---

I would also mention to the support agent that you've reproduced the issue between two Outlook.com accounts, which is the strongest evidence that this is not a recipient-side problem.

Answer 1

Please note that this is a user-to-user community. As moderators, I have limited access to internal development details. My role is to direct users to the appropriate support channels and resources. While I cannot provide backend analysis, I will do my best to assist you within my responsibilities.   

Please note that our forum is a public platform, and we will modify your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.    

---

Thank you for the update Kirsten Garbini DINEO

Please try the steps below.

1) Test a plain Outlook.com calendar invite without Teams

First, test whether a normal Outlook.com calendar invitation works without adding a Teams meeting.

• Sign in to Outlook.com Calendar.
• Create a new event from the primary Outlook.com calendar.
• Add only one attendee, preferably another Outlook.com account you own.
• Do not turn on Teams meeting or online meeting.
• Select Send.
• Ask the recipient to check:
  • Inbox
  • Junk Email
  • Deleted Items
  • Other
  • Search results for the event title

This helps confirm whether the problem is with calendar invitation delivery in general or only with Teams meeting invitations.

2) Send Teams meetings from Microsoft Teams Free instead of Outlook

For a personal Outlook.com account, try creating the meeting directly from Microsoft Teams Free.

Outlook Teams add-in does not support creating meetings with a personal account. Scheduling Teams meetings in Outlook is only available for Microsoft 365 Business Exchange accounts, and free Exchange accounts such as Outlook.com, MSN.com, and Hotmail.com are not supported for that Outlook add-in scenario. See Schedule a Microsoft Teams meeting from Outlook | Microsoft Support

To work around this:

• Go to Microsoft Teams Free and sign in with the same Microsoft account.
• Open Calendar.
• Create the meeting from Teams.
• Add the attendees, or use Copy meeting link / Share meeting invite.
• Send the meeting link in a normal Outlook.com email.

3) Check whether the Outlook.com account is hitting a sending or reputation limit

Please check the following:

• Make sure your Microsoft account security information is up to date.
• Add the test recipients to your Outlook.com Contacts.
• Send a few normal emails to those contacts before testing calendar invitations again.
• If prompted, verify the account at https://account.live.com/reputationcheck.
• After verification, try sending one plain calendar invitation again.

4) Contact Outlook.com in-product support for backend delivery review

As moderators I cannot check calendar delivery logs, Teams invitation delivery logs, or account-level delivery restrictions.

Since the invitations appear in Sent Items but do not reach attendees, please contact Outlook.com support.

To contact support:

• Sign in to Outlook.com Mail.
• Select Help on the menu bar.
• Search for calendar invitations not delivered.
• If the self-help options do not resolve the issue, scroll to Still need help? and select Yes.
• Include these details in the support request

Please tell me how it goes. If the problem persists, please don’t hesitate to reply to this thread and I will be happy to help. Have a lovely day!  

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