Important Information about Exchange Online (ExO) and Outlook (new)

S/MIME support under Windows in Outlook (new) is currently not available.

However, it should be possible to use it with a tool called [S/MIME control].

IMPORTANT PRIVACY CONCERNS!

Please note that generally, all passwords entered in Outlook (new) are sent to Microsoft. This applies to all private email accounts such as gmx, gmail, etc. EXCEPTION: the ETH email password! For the ETH email account, the password is replaced by a token that Microsoft receives. This token does not allow any conclusions to be drawn about the password.

• Outlook (classic), as the previous Outlook from the Office365 package is known, is intended to be replaced by Outlook (new).

• Microsoft has already introduced the Outlook (new) version as the default Outlook client on Windows 11 systems.
• The new Outlook does not support connection to the on-prem Exchange 2016 mail server! Therefore, Outlook (new) should only be used if your account has already been migrated to Exchange Online.
• It is important to know that Outlook (new) is more similar to a web application than a classic desktop program. It is based on Progressive Web App (PWA) technology and essentially functions like a web version of Outlook running in a desktop frame.
• Unlike the classic Outlook, the new version does not offer offline support.
• There is no local storage of emails in the form of caches or OST files.