In order to increase user comfort, for Microsoft Office, the COM Add-In For MS Exchange / Outlook On Premises is available for download under https://downloads.seppmail.com/index.php/outlook-plugin/ free of charge.

For Outlook Online, the corresponding X-platform add-In for Microsoft 365 is available in the Microsoft AppStore https://appsource.microsoft.com/en-us/marketplace/apps?search=seppmail&page=1 via a search for "seppmail" (or the direct link).