Access Graph API without the user (personal account)

Question

I need to access the user's Outlook calendar from the background service. The user may come from multiple directories or have a personal account.

There is a Microsoft guide on that topic https://learn.microsoft.com/en-us/graph/auth-v2-service?tabs=http

Unfortunately, it doesn't seem to be working with personal accounts.

When I request permission with https://login.microsoftonline.com/common/adminconsent?client_id=my_client_id&state=12345&redirect_uri=http://localhost/

I get the following response.

AADSTS500200: User account '**@outlook.com' is a personal Microsoft account. Personal Microsoft accounts are not supported for this application unless explicitly invited to an organization. Try signing out and signing back in with an organizational account.*

So, I'm wondering how to access a personal accounts' Graph API from the background service.

Answer 1

Hi @Alexander R

Unable to access personal accounts from the backend service unless the personal account is added to the organization as a guest.

Or log in the personal account to your multi-tenant application.

---

Hope this helps.

If the reply is helpful, please click Accept Answer and kindly upvote it. If you have additional questions about this answer, please click Comment.