Receiving 403 error when accessing Azure function app locked down by Azure AD B2C
We banged our heads against a wall for five days, so I wanted to make sure this was posted on stack overflow for anyone else facing this issue. Especially since it affected customers.
After working with Microsoft 24/7 for the last three days, we finally received word that this was due to an issue on their end with EasyAuth. The workaround was to add this in our Configuration of the function app:
WEBSITE_AUTH_AAD_BYPASS_SINGLE_TENANCY_CHECK = true