Outlook encrypted emails

Occasional Visitor

I would like to learn how to encrypt emails.


I have purchased a business basic account. Is it possible to encrypt emails via the Outlook Web app similar to 365 personal account where there is a padlock to select encryption.


I have tried to encrypt through the desktop version but this requires a digital certificate. 

3 Replies
The various methods to encrypt messages in O365 are listed here: https://learn.microsoft.com/en-us/microsoft-365/compliance/email-encryption?view=o365-worldwide
Office message encryption/Purview Message encryption is the easiest to setup/use, however it's not included in the Business Basic subscription, afaik. You need Business Premium, or to add the standalone AIP SKU: https://learn.microsoft.com/en-us/microsoft-365/compliance/ome-faq?view=o365-worldwide#what-subscrip...


Digital certificate is NOT necessary, please refer below, by using digital signing under OWA:


Encrypt messages by using S/MIME in Outlook Web App - Microsoft Support

Business basic plan does not include the encryption feature. Check out the license subscriptions that include encryption in Outlook on the web and learn how to encrypt emails here: