The application is fed into the Exchange environment via a manifest file. This contains all configurations for the display, access rights and references to the Add-In host. The Microsoft REST API or EWS (Exchange Web Services) can be used as an interface to the Exchange Server.
Furthermore, the button first obtains a configuration package from our SoSafe server when starting.
The add-in specifically accesses the following end points:
|getCallbackTokenAsync (with isRest flag) ||To retrieve the access token|
|GET ||/api/v2.0/me/messages/MESSAGEID ||To retrieve the mail header|
|POST ||/api/v2.0/me/sendmail ||To send the e-mail|
|DELETE||/api/v2.0/me/messages/MESSAGEID||To delete the e-mail|
|GET||/api/v2.0/me/messages/MESSAGEID/attachments/ATTACHMENTID||To retrieve an attachment|
Further information can be found in the official documentation from Microsoft: