We created a webinar meeting via Microsoft Teams. Our registrants are not receiving notification immediately and getting 6-8 hours later?

Hello @Helen Sheeba,  

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

Based on your description, I understand that your Teams webinar registrants are experiencing a significant delay (6-8 hours) in receiving their registration confirmation emails, even though these emails are normally expected to be delivered immediately after sign‑up. 

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 us provide the most accurate and effective solution, could you share a bit more detail about your setup: 

• Are all registrants affected, or only certain domains (e.g., Gmail, Outlook, company emails)? 
• Does the Registration report show attendees stuck in “Processing” for an extended period (Navigate to the Webinar on your Calendar > open the event window > Look for Registration status in the details page)?  
• Are you using standard Teams webinar or Teams Premium (which has extra email customization options)? 

This additional context will help us understand your environment and the steps already taken so we can tailor the guidance to resolve the issue effectively. 

In the meantime, here are some basic checks you can try: 

• Ask affected users to check spam/junk/quarantine: Dynamics‑sent webinar emails are sometimes filtered by external systems, especially in corporate or strict-security environments. 
• Check if registrants appear as “Processing” for long periods 
• Run a Message Trace in Exchange Online: Ask your IT admin/Microsoft 365 admin to follow this instruction Message trace in the new EAC in Exchange Online | Microsoft Learn. This can help confirm whether the email: 
  • Left Microsoft’s sending infrastructure 
  • Was deferred or retried due to transport delays 
  • Was delayed, greylisted, or throttled by the recipient’s mail system 

Please also let me know the result after you try these steps above so I can understand your situation clearer.

I apologize if I could not jump straight to a solution. I want to avoid suggesting anything that might be inaccurate or unhelpful. Once we have the details above, we’ll be able to assist you more effectively and guide you toward the right resolution.  

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

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