Security checks / Check reference / Tenant-wide

Group Guest Access Enabled

Low Severity Microsoft 365 security check in the Tenant-wide domain.

Guest access to M365 groups enabled External guests can access Microsoft 365 group content including Teams channels, SharePoint sites, Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.

Low SeverityTenant-wide

Check summary

Severity
Low
Domain
Tenant-wide
Rank in domain
2
Frameworks
5

What this check verifies

Guest access to M365 groups enabled

Why it matters

External guests can access Microsoft 365 group content including Teams channels, SharePoint sites,

How to fix it

and shared mailboxes This may expose internal data to external parties

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:

SCuBAMCSBNISTSOC2CISMCSB IM-1MCSB PA-7

References

learn.microsoft.com: /security/benchmark/azure/mcsb-identity-management...

Related Tenant-wide checks

App Mgmt No Cert Lifetime RestrictionApp Mgmt No Secret Lifetime RestrictionApp Mgmt Policy DisabledAuth Policy Guest Invite UnrestrictedAuth Policy Guest Same As MemberAuth Policy Msol Not BlockedAuth Policy Users Can Create Security GroupsAuth Policy Users Can Create Tenants

Common questions

What does the Group Guest Access Enabled check verify?

Guest access to M365 groups enabled It is a Low 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 Group Guest Access Enabled finding?

and shared mailboxes This may expose internal data to external parties 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-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.

Sponsored by Senserva

Siemserva by Senserva runs this check, Group Guest Access Enabled for example, across your own tenant: which tenants pass, which fail, ranked by Severity with the evidence attached.

  • 650+ Microsoft 365, Intune, Defender, and Entra ID checks in one scan
  • Findings mapped to SCuBA, CIS, NIST, HIPAA, SOC 2, and MCSB for audit-ready evidence
  • Senserva Trustworthy AI driven configuration remediation: validated, approve-before-apply fixes
  • Optional AI Enhanced Reporting: plain-language summaries and recommended next steps written into your reports
  • Multi-tenant and MSP practices, with bulk tenant audits and client-ready reporting
Compliance Status Report
Group Guest Access Enabled across 2 tenants, ranked by Severity
23
FAILING
87
PASSING
41
OTHER FINDINGS
CHECKSEVERITYSTATUSFINDINGS
Group Guest Access EnabledLowFAILING23
MFA for all usersCritical-11
Legacy authentication blockedHigh-6
Estimated report, sample data for illustration
Get Going with Senserva Senserva compliance Built for IT admins, security teams, and auditors, with audit-ready evidence. Senserva is a Microsoft Intelligent Security Association member.
Microsoft 365 compliance and audit evidence
See this check's evidence trail, click to play

How findings become audit evidence, in two minutes. Watch page · All videos.

Reference: the compliance and audit guide, and the full checks catalog.
Data notice: check definitions describe what Siemserva verifies and are provided as is, for informational purposes only, without warranty of any kind. Framework mappings are informational and do not constitute compliance advice; confirm requirements with your assessor. All use of this data is subject to the Senserva EULA.