MT.1010: At least one Conditional Access policy is configured to block legacy authentication for Exchange ActiveSync.
| ID | MT.1010 |
| Severity | High |
| Suite | Mito |
| Product | Entra ID |
| Related products | Exchange Online |
| Feature | Conditional Access |
| Security area | Authentication |
| Resource type | Tenant |
| User impact of fixing | Medium |
| Effort to fix | Medium |
| Framework controls | nist-800-53-r5:CM-7 Least Functionality |
| MITRE ATT&CK | T1078.004, T1110 |
| Reads from | Microsoft Graph |
| Licence needed | AAD_PREMIUM |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Legacy authentication is an unsecure method to authenticate. This function checks if the tenant has at least one Conditional Access policy that blocks legacy authentication.
Learn more: https://learn.microsoft.com/entra/identity/conditional-access/howto-conditional-access-policy-block-legacy
Remediation action
Section titled “Remediation action”Review the configuration described above.
Mito check. Author: f-bader. Open-source licences.
Open-source licences. CIS Benchmark material © Center for Internet Security, Inc.; CISA SCuBA baselines are public domain (CC0).
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