how to fix invitations email for team meeting

Hello @Penny Hoh, 

Good day! Thank you for posting your valuable question on the Microsoft Q&A forum. 

Based on your description, I understand that you have recently subscribed to Microsoft Teams Essentials and were initially able to schedule Microsoft Teams meetings and send calendar invitations via Outlook successfully. However, on subsequent days, the meeting invitations were not received by recipients, and in at least one case, the invite was delivered only after a delay of a couple of days. 

Please let me know if I misunderstood any part of your issue or if there are additional details you’d like to share. 

To help provide the most accurate and effective solution for this meeting invitation delivery issue, could you please share a bit more information about your setup? 

• Which method are you using to schedule and send the meeting invites (Outlook Desktop, Outlook on the Web, or directly from the Microsoft Teams calendar)? 
• What Microsoft 365 licenses are currently assigned to your account (For example, Teams Essentials only, or Teams Essentials plus Exchange Online Plan 1)? 
• Did the recipients never receive the meeting invitation at all, or did it arrive after a delay? 
• Have the recipients checked their Junk Email, Spam, or Quarantine folders to see whether the meeting invite was filtered? 
• Is this a newly created Microsoft 365 tenant or a newly added domain (less than 30 days old)? 
• Are you able to reproduce the issue if you send the same meeting invitation by switching between the Web application and the desktop application? 

This additional context will help us better understand your environment, isolate whether the behavior is related to licensing, mail flow, or the Outlook client, and guide us toward the most appropriate resolution. 

I apologize that I’m not able to jump straight to a final solution at this point. I want to avoid suggesting steps that might be inaccurate or unhelpful without first understanding your exact configuration. Once we have the details above, we’ll be in a much better position to assist you effectively. 

Looking forward to your response so we can get this sorted out together. 

If you have extra questions about this answer, please click "Comment". 

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