Security checks / Check reference / Tenant-wide
Auth Policy Guest Same As Member
Medium Severity Microsoft 365 security check in the Tenant-wide domain.
Guest users have the same access as member users. Guests should have restricted default permissions Same-as-member guest access grants external identities full directory read and group enumeration; lateral movement and data discovery become trivial Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.
Check summary
What this check verifies
Guest users have the same access as member users. Guests should have restricted default permissions
Why it matters
Same-as-member guest access grants external identities full directory read and group enumeration; lateral movement and data discovery become trivial
How to fix it
Set guest access to restricted in authorization policy; limit directory browsing
Siemserva flags every tenant where this check fails and, with Senserva Trustworthy AI remediation, can propose a validated fix you approve before it applies.
Ask your own AI about this check
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Compliance framework mappings
Findings from this check serve as evidence for:
References
Related Tenant-wide checks
Common questions
What does the Auth Policy Guest Same As Member check verify?
Guest users have the same access as member users. Guests should have restricted default permissions It is a Medium Severity check in the Tenant-wide domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.
How do I fix a Auth Policy Guest Same As Member finding?
Set guest access to restricted in authorization policy; limit directory browsing Siemserva ranks the finding by Severity and, with Senserva Trustworthy AI, can propose a validated, approve-before-apply configuration fix.
Which compliance frameworks does this check evidence?
Findings from this check map to SCuBA, MCSB, NIST, SOC2, CIS, and MCSB controls IM-1, PA-1, PA-7. That mapping is what turns a scan finding into audit evidence.
Can I ask my own AI about this check?
Yes. This page includes a free copy-paste AI prompt carrying the check's facts: what it verifies, the risk, the remediation, and the framework mappings. Paste it into Claude, ChatGPT, or Copilot; cite-worthy detail without giving an AI access to your tenant.
All 672 checks with severities and mappings: the Microsoft 365 security checks catalog.