Microsoft Entra ID · Short case
Blocking legacy authentication
Summary
I reviewed the use of legacy authentication protocols and prepared a policy to block them. Before activation, I checked its impact with Report-only mode and sign-in logs.
- My role
- Investigation, policy creation, validation and activation.
- Scope
- Organisation access.
- Validation
- Report-only mode and Sign-in Log review.
- Status
- Active.
What I did
I created a policy to block Legacy Authentication and first kept it in Report-only mode. I reviewed sign-ins to check whether any account or service still depended on these protocols.
The validation showed no impact, so I activated the policy with the planned scope.
Result
Legacy authentication flows were blocked and the policy remains active. The change strengthened modern access controls without affecting the sign-ins that were in use.