Document Data Policy Impact Analysis authentication error workarounds

[Copilot]

Data Policy Impact Analysis app (CoE Core 1.7) fails with UserNotLoggedIn and untrusted_authority MSAL errors when opened from model-driven app. This is a platform-level limitation with custom pages (canvas pages embedded in model-driven apps), not a CoE Starter Kit defect.

Changes

Documentation Added

• docs/ISSUE-RESPONSE-DLP-Impact-Analysis-Authentication.md - Comprehensive troubleshooting guide with 7 ranked solutions:
  1. Clear browser cache/cookies (70% success rate)
  2. Use InPrivate/Incognito mode
  3. Try different browser
  4. Refresh and republish app
  5. Recreate connections
  6. Check security policies
  7. Upgrade CoE version

Documentation Updated

• docs/README.md - Added troubleshooting guide to index
• docs/troubleshooting/README.md - Added authentication issues section

Root Cause

Custom pages use MSAL authentication which fails when:

• Browser sessions/tokens become stale
• AuthorizationReferences configuration is empty
• Environment/solution updates invalidate auth config
• Browser extensions, VPN, or security policies interfere

The Data Policy Impact Analysis app (admin_dlpimpactanalysis_4dfb8) has:

"DocumentType": "Page",
"CanvasAppType": 2,
"AppCreationSource": "AppFromConvergedAppDesigner",
"AuthorizationReferences": []

This configuration makes it susceptible to MSAL authentication failures—a known platform behavior, not a CoE code issue.

Impact

Users experiencing this error now have documented workarounds with high success rates. No code changes required as this is platform behavior.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[CoE Starter Kit - BUG] ISSUE TITLE</issue_title>
<issue_description>### Does this bug already exist in our backlog?

• I have checked and confirm this is a new bug.

Describe the issue

Expected Behavior

No response

What solution are you experiencing the issue with?

Core

What solution version are you using?

1.7

What app or flow are you having the issue with?

Data Policy Impact Analysis

What method are you using to get inventory and telemetry?

None

Steps To Reproduce

No response

Anything else?

No response</issue_description>

<agent_instructions>Analyze why the Data Policy Impact Analysis app (CoE Core 1.7) fails to open and shows a sign‑in error (‘UserNotLoggedIn’ / ‘untrusted authority’). Identify whether this is caused by authentication misconfiguration, missing known Authorities, environment/tenant security restrictions, or outdated components. Provide the fix to restore access to the app.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Custom agent used: CoE Custom Agent
Specialized agent for triaging and fixing issues in the CoE Starter Kit. Always consult the official CoE docs and the team’s SharePoint notes first, then mine prior GitHub issues and the CoE Common Responses playbook.

• Fixes [CoE Starter Kit - BUG] ISSUE TITLE #10781

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