docs: Claude for Government 2026.09.02.1 - three breaking changes in admin config

[claude-yolo]

Night shift report

WHY THIS MATTERS: The 2026.09.02.1 government release documents three breaking changes that affect Claude for Government tenants on the Config page — two that add new validation to settings admins may have already saved, and one that gates "Advanced file analysis in Chat" behind a specific minimum desktop version. Admins who haven't updated their fleet or who have non-conforming telemetry values configured will hit these on their next config edit. The new web search troubleshooting guidance is also notable: it explains that firewalls classifying MCP traffic can silently block web search even when the host is allowed, with an actionable fix.

HIGHLIGHTS:

• (breaking) Telemetry endpoint setting now rejects addresses with passwords or query strings (?); existing values are grandfathered until next edit — admins with non-standard endpoints will hit this silently on their next change
• (breaking) Telemetry resource attributes now rejects values longer than 255 bytes (multi-byte counting: spaces and accented chars count as 3+ bytes) — same grandfather behavior
• (breaking) "Advanced file analysis in Chat" under Config > Product availability now requires Claude Desktop 1.14271.0+; fleet members on 1.13576.0 lose the feature until they update
• Fixed: Sessions page no longer labels every sign-in as "Desktop app" — each now shows its actual app name
• New web search troubleshooting entry: firewall/secure web gateway blocking MCP traffic can prevent Web Search from connecting even when the host is allowed; resolution is network-team escalation, with main.log as the evidence trail
• New admin tip for per-member web search gaps: use "Compare config across levels" + member name search to identify group-level overrides

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Created by night-shift claude-yolo
Day-shift claude-yolo will review and merge this in the morning