Microsoft 365 Error Codes

How to Fix Microsoft Word Sign-In Error Code 2156265473

Maira Mehtab Sep 21, 2026 868 views

Question details

The user needs to resolve an authentication failure that prevents them from signing into Microsoft Word.

Product: Microsoft Word
Device & OS: Windows
Scenario: Attempting to sign in to a Microsoft 365 account to activate or use Microsoft Word.
Observed behavior: The sign-in process fails and displays error code 2156265473, blocking access to the application.

Before you start

Before proceeding with system changes, open a web browser and verify if you can successfully log into the online Microsoft Office portal.

Solution 1Recommended

Clear Office Credentials in Windows Credential Manager

Removing corrupted or outdated login tokens forces Microsoft Word to establish a fresh, clean connection to the authentication servers.

Damaged Office credentials are the most common cause of error 2156265473. Clearing them will not delete your documents or uninstall your software; it simply resets your login state.

Open Credential Manager

Click the Windows Start menu, type 'Credential Manager' into the search bar, and press Enter to launch the application.

Access Windows Credentials

In the Credential Manager window, click on the 'Windows Credentials' tab.

Remove Office Credentials

Scroll down to the 'Generic Credentials' section. Look for any entries starting with 'MicrosoftOffice' or 'mso'. Click the down arrow next to each entry and select 'Remove'.

Restart and Sign In

Restart your computer, open Microsoft Word, and attempt to sign in again with your account details.

Tip: You may need to enter your password again for other Microsoft applications like Outlook or Excel after clearing these credentials.

Solution 2

Remove Conflicting Microsoft Accounts

Having multiple work, school, or personal accounts signed into the same device can cause authentication conflicts.

Solution 3

Check Organization-Wide Issues

If the online Office portal is inaccessible, the error is likely caused by an organizational network block or a Microsoft server outage.

Free Microsoft Office alternative

Use WPS Office as a Reliable Alternative to Microsoft Word

If you are unable to resolve Microsoft 365 sign-in errors and need to edit documents urgently, WPS Office provides a free, lightweight, and highly compatible alternative that doesn't rely on complex authentication processes to edit your local files.

1. Download and Install: Download WPS Office Free from the official website and run the quick installation.
2. Open Your Document: Launch WPS Writer and click 'Open' to select the Word document you need to edit.
3. Edit Without Interruptions: Enjoy full editing capabilities and save your document directly in the standard .docx format.

Seamlessly open and edit Microsoft Word (.docx) formats without formatting loss.Edit local documents immediately without being blocked by cloud sign-in errors.Free and lightweight software that installs in minutes.Familiar user interface requiring almost zero learning curve.

microsoft office alternative - wps office

Frequently Asked Questions

Why am I getting error code 2156265473 when signing into Word?

This error code usually indicates a problem with the authentication tokens stored on your device. It is commonly caused by corrupted Windows credentials, account conflicts, or inability to reach the Microsoft authentication servers.

Will removing Windows credentials delete my Word documents?

No. Removing Microsoft Office credentials from the Windows Credential Manager only deletes the saved login tokens. Your local files and cloud documents remain completely safe and untouched.

What should I do if the Microsoft Office portal is also inaccessible?

If you cannot access the online Office portal, it indicates a broader network or server issue. Check your internet connection, contact your company's IT administrator to ensure your account isn't locked, or check the Microsoft Service Status page for ongoing outages.

Microsoft Office Error Codes