Whats the difference between IMAP.AccessAsUser.All of Graph API permissions and Office 365 Exchange online IMAP.AccessAsApp

Question

I want to implement a way to the manage the mails in a mail box using client credentials flow. I want to retrieve the emails and manage them. Now there are two kind of permissions that I see, MAP.AccessAsUser.All of Graph API and IMAP.AccessAsApp and Office 365 Exchange online. What is the recommended approach that I need to follow.

Answer 1

Hi @Sujith Dhanpal

The Graph one is currently a Delegate level permission only, the Exchange one can also be granted at the application level. You need to use client credential flow, so you need to use Office 365 Exchange online IMAP.AccessAsApp.

More details can be found at this link:

https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-authenticate-an-ews-application-by-using-oauth

Hope this helps.

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