Neither tenant is B2C or tenant doesn't have premium license
What causes it and how to fix it:
- signInActivity without Entra ID P1 — the retry without it turns "not measured" into "0 inactive users"Selecting signInActivity on /users fails with 403 in tenants without Entra ID P1/P2; the common fallback (retry without the property) makes every user look "never signed in" or gets skipped, so inactive-user and unused-licence reports silently show 0 — store an explicit "not measured" state insteadCause and fix →