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• Directory (tenant) ID. This can be seen on the Overview blade.

• Application ID, referred to as Client ID on OnLink. This can be seen on the Overview blade.

• And finally, you need the client secret. You should have already copied it somewhere earlier right after you created it, but if you didn’t, create a new one.

References:

1. https://learn.microsoft.com/en-us/graph/auth-v2-service?tabs=http

2. https://laurakokkarinen.com/how-to-set-up-an-azure-ad-application-registration-for-calling-microsoft-graph/#the-application-identity