fix(sharepoint): false positives on disabled external sharing

[HugoPBrito]

Context

SharePoint external sharing check flagged tenants even when org-level external sharing was disabled.

Fix #9292

Description

• Updated sharepoint_external_sharing_managed.py to treat sharingCapability == "Disabled" as a PASS before domain restriction evaluation, preventing false positives.
• Added coverage for the disabled-sharing scenario in sharepoint_external_sharing_managed_test.py.

Steps to review

1. Read logic change and test addition in the two files above.
2. Run poetry run pytest tests/providers/m365/services/sharepoint/sharepoint_external_sharing_managed/sharepoint_external_sharing_managed_test.py (or full M365 suite) to verify.
3. Do a practical test with a real account changing sharepoint settings.

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.
• Review if is needed to change the Readme.md
• Ensure new entries are added to CHANGELOG.md, if applicable.

UI

• All issue/task requirements work as expected on the UI
• Screenshots/Video of the functionality flow (if applicable) - Mobile (X < 640px)
• Screenshots/Video of the functionality flow (if applicable) - Table (640px > X < 1024px)
• Screenshots/Video of the functionality flow (if applicable) - Desktop (X > 1024px)
• Ensure new entries are added to CHANGELOG.md, if applicable.

API

• Verify if API specs need to be regenerated.
• Check if version updates are required (e.g., specs, Poetry, etc.).
• Ensure new entries are added to CHANGELOG.md, if applicable.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

✅ All necessary CHANGELOG.md files have been updated.

[github-actions]

✅ Conflict Markers Resolved

All conflict markers have been successfully resolved in this pull request.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.53%. Comparing base (2608886) to head (6e13420).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #9298       +/-   ##
===========================================
+ Coverage   75.39%   88.53%   +13.13%     
===========================================
  Files           1       93       +92     
  Lines         126     3505     +3379     
===========================================
+ Hits           95     3103     +3008     
- Misses         31      402      +371     

Flag	Coverage Δ
prowler-py3.10-config	?
prowler-py3.10-m365	88.53% <100.00%> (?)
prowler-py3.11-config	?
prowler-py3.11-m365	88.53% <100.00%> (?)
prowler-py3.12-config	?
prowler-py3.12-m365	88.53% <100.00%> (?)
prowler-py3.9-config	?
prowler-py3.9-m365	88.53% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	88.53% <100.00%> (+13.13%)	⬆️
api	∅ <ø> (∅)

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[github-actions]

🔒 Container Security Scan

Image: prowler:cd4d233
Last scan: 2025-11-26 11:21:32 UTC

📊 Vulnerability Summary

Severity	Count
🔴 Critical	2
Total	2

2 package(s) affected

⚠️ Action Required

Critical severity vulnerabilities detected. These should be addressed before merging:

• Review the detailed scan results
• Update affected packages to patched versions
• Consider using a different base image if updates are unavailable

---

📋 Resources:

• Download full report (see artifacts)
• View in Security tab
• Scanned with Trivy

[prowler-bot]

💚 All backports created successfully

Status	Branch	Result
✅	v5.14

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details