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Outlook | Windows | Classic Outlook for Windows | For home
Using Classic Outlook on Windows for personal email, calendar, and contact management
Dear Sumit Rawat
Have a nice day! Thank you for posting to the Microsoft community. We will be happy to help you!
First of all, we regret for the inconvenience caused to your work. Based on your description, I have a general understanding of your question, to help you better, I still need collect more information to narrow down the scope of question:
- Please first use your account to login OWA (Outlook Web App) **** and check whether you get the same issue in outlook web, thanks. For your reference Set up Outlook to use S/MIME encryption - Microsoft Support Open encrypted and protected messages - Microsoft Support
- Ensure that you are using the latest version of Outlook. If not please check the result after updating. For your reference Check for updates in Outlook - Microsoft Support
- Seemly you have got some error information, if yes please kindly share a complete screenshot with me, thanks.
- What's your type of account(buisness account within business subscription/outlook.com/hotmail.com/live.com/msn.com/imap account/pop account)
Please kindly believe that I will do my best to do more research and testing to help you further when I get the feedback from you I need.
Please note that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.
Thank you in advance for your understanding. Your patience and cooperation will be greatly appreciated. Hope for all the best!
Sincerely
Kerry Chen | Community Moderator