I want to conect to microsoft exchange using API with java application run security algorithms before it reaches user's inbox. How can I do that the API " GET https://graph.microsoft.com/v1.0/me/me...
It sounds like you need to develop a https://learn.microsoft.com/en-us/exchange/client-developer/transport-agents/reading-and-modifying-messages-in-the-exchange-2013-transport-pipeline so you can act on messages programmatically before they are received by a user's Exchange mailbox. However, development of these agents are not supported in Exchange Online (Exchange Server 2007 and newer only) and you cannot use Graph to do something similar.