Hi there ShivaTMN,
Welcome to Microsoft Community
I'm Bobadoye and I'd be happy to help you out with your question.
Apologies for the inconvenience, if you are experiencing this issue with New Teams on your PC, please follow the steps below:
- Reset your Teams: Go to Settings>Apps>Apps & features or Installed Apps>Microsoft Teams>Advanced options>Reset
- Check for update and update Outlook to the latest version
- Uninstall and re-install Outlook
I hope this information helps. If you have any questions, please let me know and I'll be glad to assist you further.
If the reply was helpful, please don’t forget to upvote or accept as an answer, thank you.
Best Regards,
Bobadoye