[BUG] Claude in Chrome — Navigation blocked for teams.cloud.microsoft and outlook.cloud.microsoft after Microsoft domain migration**

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Microsoft has officially migrated all Microsoft 365 products to new domains:

• Microsoft Teams: teams.microsoft.com → teams.cloud.microsoft
• Microsoft Outlook: outlook.office365.com → outlook.cloud.microsoft

Claude in Chrome's server-side blocklist is blocking navigation and all interactions (screenshot, click, DOM read) on these new domains, returning permission_required: teams.cloud.microsoft and permission_required: outlook.cloud.microsoft.

The old domains (teams.microsoft.com, outlook.office365.com) automatically redirect to the new ones, making it impossible to use Claude in Chrome with Microsoft Teams or Outlook Web — even with Chrome extension site access set to "On all sites".

What Should Happen?

Expected Behavior

Claude in Chrome should be able to navigate, screenshot, and interact with teams.cloud.microsoft and outlook.cloud.microsoft, as these are the official current domains for Microsoft Teams and Outlook Web — both legitimate, widely-used enterprise productivity tools.

Error Messages/Logs

High — breaks all Microsoft Teams and Outlook automation use cases for enterprise users. The old domains no longer serve content; they redirect immediately to the new `.cloud.microsoft` domains, making the block total with no workaround available to end users.

Steps to Reproduce

Steps to Reproduce

1. Install Claude in Chrome v1.0.74
2. Set Chrome extension site access to "On all sites" (chrome://extensions → Details → Site access)
3. From a Claude chat, attempt to navigate to https://teams.microsoft.com or https://outlook.office365.com/mail/
4. Both URLs automatically redirect to teams.cloud.microsoft / outlook.cloud.microsoft
5. Claude in Chrome returns: permission_required: teams.cloud.microsoft

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude in Chrome v1.0.74

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Environment

• Claude in Chrome version: 1.0.74
• Chrome site access setting: On all sites
• OS: Windows
• Tenant: Microsoft 365 (pjus.com.br)
• Affected domains: teams.cloud.microsoft, outlook.cloud.microsoft
• Previously working domains (now redirecting): teams.microsoft.com, outlook.office365.com

Suggested Fix

Add teams.cloud.microsoft and outlook.cloud.microsoft to the server-side allowlist, or update the domain mapping to follow Microsoft's official migration from *.microsoft.com → *.cloud.microsoft.

Related issues: #51273, #55580, #57219, #58464