How to Fix Microsoft 365 Admin Center Error Code 0 After Windows Update
Question details
The user is unable to access the Microsoft 365 admin center using Microsoft Edge after a Windows update, receiving an Error Code 0 message.
- Product
- Microsoft 365 Admin Center
- Device & OS
- Windows
- Scenario
- Attempting to log into or load the Microsoft 365 admin center in standard browsing mode after applying a recent Windows update.
- Observed behavior
- The admin center page fails to load and displays Error Code 0, but successfully opens when using an Edge InPrivate window.
Verify your internet connection and check if other standard websites load properly in Microsoft Edge before troubleshooting the Microsoft 365 Admin Center.
Use an InPrivate Window to Access the Admin Center
Using an InPrivate or Incognito window bypasses existing cached authentication data that may be causing the error.
Authentication request handling regressions can sometimes prevent the admin center from loading in standard browsing sessions. An InPrivate window isolates your session from stored cookies and tokens, allowing successful login.
Launch the Microsoft Edge browser on your Windows device.
Click the three-dot menu (Settings and more) in the top-right corner and select 'New InPrivate window' or press Ctrl + Shift + N.
Type the Microsoft 365 admin center URL into the address bar and log in with your administrative credentials.
Check Microsoft 365 Service Health
Verify if the issue is tied to a known global service incident reported by Microsoft.
Clear Browser Cache and Cookies
Clearing old authentication tokens can resolve conflicts introduced immediately after a system update.
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Frequently Asked Questions
What causes Error Code 0 in the Microsoft 365 admin center?
Error Code 0 is typically caused by a regression in Microsoft's authentication request handling or a conflict with corrupted browser cache following a Windows update.
Why does the admin center work in an InPrivate window but not normally?
InPrivate browsing ignores existing cache and cookies. If your standard browser session holds a corrupted authentication token, InPrivate mode bypasses it and forces a fresh login request.
How can I track when Microsoft fixes an admin center issue?
You can monitor the Service Health dashboard within the Microsoft 365 admin center (accessed via InPrivate mode) to track specific incident reports and real-time restoration updates.
