Teams App Permission Policy: Global Allow Overridden by Per‑User Block in Production

Goal: verify that a Teams app permission policy configured globally to allow an app behaves the same in a test tenant and in production when per‑user policies may be present.

Constraints/uncertainty: The Teams admin center shows the global policy, but the effective policy returned by Microsoft Graph reflects per‑user overrides, and documentation does not clearly state precedence, leading to silent failures. Unclear whether the most restrictive setting always wins or if UI caching causes discrepancy.

Does a per‑user block always take precedence over a global allow for the same app, regardless of assignment method?

How can administrators reliably determine the effective app permission policy for a user before deploying changes to production?

Is there a supported way to view or simulate the effective policy in the Teams admin center that matches the Graph API result?