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Fix Microsoft 365 sign-in issues with Outlook for Windows

If you can't sign in to your Microsoft 365 email in Outlook on Windows, your computer might be using an older sign-in experience. Update Windows and turn on the newer sign-in experience to fix it.

Required: You need administrator access to the affected computer running Windows 11. If you don’t have administrator access, contact your admin.
Warning: These steps change the Windows Registry. Incorrect registry changes can cause serious problems with your computer. Only change the setting described below.
  1. Select Start, and then Settings.
  2. Select Windows Update, and then Check for updates.
  3. Install all available updates, and then restart your computer if prompted. The newer sign-in experience requires Windows 11 H125 or later.
  4. Select Start and search for Registry Editor.
  5. Right-click Registry Editor, and then select Run as administrator. If Windows asks for permission, select Yes.
  6. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\AAD. If the AAD key doesn't exist, create it:
    1. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows.
    2. Right-click Windows, and then select New > Key.
    3. Enter AAD as the key name.
  7. Select the AAD key. In the right pane, right-click an empty area, and then select New, and then DWORD (32-bit) Value.
  8. Enter WebView2Integration as the value name.
  9. Double-click WebView2Integration, enter 1 in Value data, and then select OK.
  10. Close Registry Editor, and then restart your computer.
  11. Open Outlook and sign in to your Microsoft 365 email account. When prompted, complete the GoDaddy sign-in. You'll see the newer sign-in experience and can use your email in Outlook.
Note: To turn off the newer sign-in experience, change the WebView2Integration value to 0.

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