EWS OAuth - API Permission full_access_as_app

Question

I`m using the tutorial on the link
"https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-authenticate-an-ews-application-by-using-oauth"
, I have an Azure Subscription and Office 365 Developer Sandbox E5 instance.

I have registered the application on Azure but can`t find "full_access_as_app" mentioned in the tutorial.

Currently I`m getting 401 when I try and access via code.

Also under API Permissions cant seem to find Exchange API.

I have tried the recommendation in https://learn.microsoft.com/en-us/answers/questions/798643/graph-endpoint-url-for-full-access-as-app.html, but cant seem to get Office365 Exchange Online on searching under My API.

My end goal is to use EWS Exchange services using OAuth token.

Assistance in this regard will be much appreciated.

Answer 1

In the link you referenced https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-authenticate-an-ews-application-by-using-oauth the recommend way of adding the permissions is to modify the manifest if you haven't done this before see https://learn.microsoft.com/en-us/azure/active-directory/develop/reference-app-manifest and then . eg

{
"resourceAppId": "00000002-0000-0ff1-ce00-000000000000",
"resourceAccess": [
{
"id": "dc890d15-9560-4a4c-9b7f-a736ec74ec40",
"type": "Role"
}
]
}

Once you have modified the manifest you should then see the permission in the permission tab added to you application registration and you can then consent to.