Microsoft 365 Error Codes

Fix Microsoft App and Edge Sign-In Errors on Windows (Error 1001)

Huma Ashraf Ch Oct 10, 2026 870 views

Question details

The user is unable to sign into Microsoft applications (such as Word and PowerPoint) and cannot synchronize Microsoft Edge on their Windows laptop, despite the account working fine on a mobile phone.

How to Fix Microsoft App and Edge Sign-In Errors on Windows

Product: Microsoft 365 and Microsoft Edge
Device & OS: Windows
Scenario: Attempting to sign in to Microsoft Office apps and the Edge browser for synchronization and cloud access on a PC.
Observed behavior: Sign-in fails on the laptop, typically triggering a 'Something went wrong [1001]' error, while the identical account credentials work perfectly on a smartphone.

Before you start

Ensure you have a stable internet connection and verify that your Microsoft account credentials are correct by logging in on another device or via the web browser.

Solution 1Recommended

Remove Stored Credentials and Reconnect Your Account

Clearing old or corrupted credentials from Windows and reconnecting your work or school account is often the most effective way to resolve sign-in error 1001.

Windows stores your sign-in information locally. If this cached data becomes corrupted, Microsoft apps and Edge will fail to authenticate properly. Removing these credentials forces the system to request a fresh, secure connection.

Open Credential Manager

Click the Windows Start button, type 'Credential Manager' in the search bar, and open the application.

Clear Microsoft Credentials

Click on 'Windows Credentials'. Scroll through the list, locate any entries containing Office, OneDrive, Teams, or Microsoft, click on them, and select 'Remove'.

Disconnect the Account

Go to Windows Settings > Accounts > Access work or school. Click on your connected account and select 'Disconnect'.

Re-add Your Account

Restart your computer. Open Word or Microsoft Edge, click 'Sign in', and enter your credentials to establish a new connection.

Remove Stored Credentials and Reconnect Your Account

Account Refresh Complete: Your local credentials have been refreshed. This resolves the majority of authentication miscommunications between Windows and Microsoft servers.

Solution 2

Run an Online Repair for Microsoft 365

Repairing the Office installation can fix corrupted application files that may be causing the sign-in failures.

Solution 3

Start Office in Safe Mode

Safe mode allows you to open Office apps without add-ins, helping identify if a third-party extension is blocking the sign-in process.

Free Microsoft Office alternative

Use WPS Office When Microsoft 365 Sign-In Fails

If you are stuck with Microsoft sign-in errors and need to access or edit your documents urgently, WPS Office is a perfect alternative. It operates efficiently offline, does not force you through complex cloud authentication just to open local files, and is highly compatible with Microsoft formats.

1. Download the Installer: Visit the official WPS website and download the free WPS Office installation file.
2. Install WPS Office: Run the installer and follow the quick on-screen instructions to set up the software.
3. Open Your Documents: Launch WPS Office and open your existing .docx, .xlsx, or .pptx files directly without needing to sign in.

Completely free and lightweight office suiteFully compatible with Microsoft Word, Excel, and PowerPoint formatsEdit local files immediately without mandatory sign-in or cloud sync issuesFamiliar user interface for a seamless transition

Frequently Asked Questions

What does 'Something went wrong [1001]' mean in Microsoft 365?

Error 1001 usually indicates a problem with the Web Account Manager (WAM) in Windows or corrupted cached credentials, which prevents the Office applications from communicating properly with Microsoft's authentication servers.

Why does my Microsoft account work on my phone but not on my PC?

Your smartphone and Windows PC use entirely different authentication mechanisms. A sign-in failure isolated to the PC is typically caused by local Windows software issues, such as a corrupted credential cache or outdated network profiles, rather than a problem with your account itself.

Will running a Microsoft 365 Online Repair delete my personal files?

No, running an Online Repair only fixes the application files and registry keys associated with the Microsoft 365 software. Your personal documents, spreadsheets, and presentations remain safely untouched on your hard drive.

Microsoft Office Error Codes