⚠ This guide is for system administrators and technical users. It shows how to disable BrowserSignin, Sync, SSO, and Web Account Manager integration in Microsoft Edge.

Even if Windows is logged into a Microsoft Account, Edge can be forced to stay fully local — no auto sign-in, no sync, no profile linking. This method uses Registry-based policies identical to enterprise deployments.

1) What This Fix Does

This article disables:

• ✔ Automatic Microsoft Account sign-in inside Edge
• ✔ Sync, profile linking and cloud data
• ✔ Windows SSO (Web Account Manager → Edge)
• ✔ “Sign in to sync” prompts
• ✔ Auto-created profiles from Windows login

After applying the policies, Edge behaves like:

• 🔒 Local-only browser
• 🛑 No Microsoft Account allowed
• 🧹 No syncing, no cloud history, no auto imports

2) Why Edge Signs In Automatically

Microsoft Edge uses Windows services such as WAM (Web Account Manager) and SSO APIs to retrieve your Microsoft credentials even if:

• You never clicked “Sign in” inside Edge
• You are using a local Windows account
• You created a new Edge profile

By default, Edge tries to “pull” your Windows login using:

• SeamlessWebToBrowserSignInEnabled
• WebToBrowserSignInEnabled
• BrowserSignin

The fix below disables all three layers.

3) Backup the Registry (recommended)

reg export "HKLM\SOFTWARE\Policies\Microsoft\Edge" "%USERPROFILE%\Desktop\edge_backup_HKLM.reg" /y
reg export "HKCU\SOFTWARE\Policies\Microsoft\Edge" "%USERPROFILE%\Desktop\edge_backup_HKCU.reg" /y

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