Fix the “Something Went Wrong [1001]” error in Microsoft 365

Let’s learn how to Fix the – Something Went Wrong [1001] error in Microsoft 365. Microsoft 365 displays the error message “Something went wrong [1001]” because user profile settings face problems, authentication settings are wrong, or security software creates conflicts in the system. Understanding the potential reasons behind this error makes it easier to fix it quickly.

Possible Reasons for Error Code – Something went wrong [1001]

Let’s discuss the following reasons that may result in Error Code 1001 in Microsoft 365

1. Corrupted User Profile – A damaged or improperly configured user profile can prevent Microsoft 365 from authenticating correctly.
2. Conflicts with Multi-Factor Authentication (MFA) – Inconsistent MFA settings, especially in Virtual Desktop Infrastructure (VDI) environments, can trigger this error.
3. Interference from Antivirus Software – Some security programs, such as Trend Micro Antivirus, may block the AAD Broker Plugin, causing authentication failures.
4. Outdated or Corrupt Authentication Data – Microsoft 365 stores authentication data in folders like OneAuth and IdentityCache, which can become outdated or corrupted.
5. Conflicting Add-ins in Microsoft 365 Apps – Corrupt or incompatible add-ins may interfere with the login process.
6. Network and Firewall Restrictions – If network configurations or firewalls block Microsoft 365 services, the login process might fail.

Here are some steps that will help you fix Error Code 1001 in Microsoft 365

1. Add Scan Exclusion in Trend Micro Antivirus (If Applicable)

Some antivirus programs, including Trend Micro, can mistakenly block authentication processes in Microsoft 365. The AAD Broker Plugin, which is responsible for handling authentication, may be flagged as a security threat. Adding an exclusion in your antivirus settings ensures the plugin is not interfered with.

Steps to Add Scan Exclusion:

1. Open Trend Micro Antivirus from the system tray.
2. Click the gear icon to open Settings.
3. Select Exception Lists > Add.
4. Click Browse…, then navigate to:
5. makefile
6. Copy code

   C:\Users\Username\AppData\Local\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\

7. Click OK to confirm the exclusion.
8. Now, restart your PC and check if the issue is resolved.

   

2. Recreate the User Profile

A problematic user profile configuration together with profile corruption prevents authentication processes between Microsoft 365 and its users. The issue causes authentication problems because of system crashes together with failed updates and software conflicts. You need to establish a new user profile because it will adjust all authentication parameters to their default state which enables Microsoft 365 to operate correctly.

Steps to Create a New User Profile:

1. Access Settings through your system and find the Accounts section.
2. Click on Family & Other Users from the Settings menu.
3. Go to Add someone else to this PC button, under Other users.

   

4. The option to proceed without access to the person’s sign-in details is available.
5. Press the “Add any user without a Microsoft account .” option> input a username >>add password >> select Next.
6. Log into the new account to verify that Microsoft 365 functions as intended.

3. Clear OneAuth and IdentityCache Folders

Microsoft 365 stores authentication tokens in the OneAuth and IdentityCache folders. The corruption of these files will lead to unsuccessful login attempts. The process of clearing both OneAuth and IdentityCache folders makes Microsoft 365 create new authentication information which solves any authentication-related errors.

Steps to Clear These Folders:

1. Close all Microsoft 365 applications.
2. Open the Windows Run dialog by pressing Windows + R and enter “%localappdata%. Hit Enter to access the folder.
3. Open the Microsoft folder.
4. Place the OneAuth and IdentityCache folders on your desktop by cutting and pasting them from the Microsoft folder location.
5. The restart process can begin after which you should attempt another sign-in procedure.

   

4. Open Microsoft 365 Applications in Safe Mode

The improper authentication of Microsoft 365 apps during login procedures can occur because of possibly corrupted add-ins or misconfigured settings. The process of running applications in Safe Mode disables third-party extensions to enable you to determine if an add-in is creating the problem. You should disable possible conflicting add-ins if Microsoft 365 applications work without issues when running in safe mode.

Steps to Open Microsoft 365 Apps in Safe Mode:

1. Close all Microsoft 365 applications.
2. Type any of these commands into the Windows + R dialog to open the desired Microsoft application:

Word → winword /safe
Excel → excel /safe
Outlook → outlook /safe
PowerPoint → powerpnt /safe
OneNote → onenote /safe

3. Click OK if prompted.

4. Users should disable any latest add-ins through Microsoft 365 if the platform operates normally during Safe Mode

Check Network and Firewall Settings

Sometimes, network restrictions or firewall rules block Microsoft 365 authentication.

Troubleshooting Steps:

1. Restart your router.
2. Disable any VPN or proxy settings temporarily.
3. Ensure Microsoft 365-related domains (e.g., login.microsoftonline.com) are not blocked in your firewall settings.
4. Run Windows Network Troubleshooter by going to Settings > Network & Internet > Troubleshoot problems.

6. Repair Microsoft 365 Installation

When Microsoft 365 software becomes corrupted it causes multiple system errors in frequent occurrences. The repair tool will restore missing and damaged files to enhance Microsoft software performance. Users can perform an Online Repair from the Microsoft Office 365 installation to fix recurring issues when the Quick Repair method fails to solve the problem.

How to Repair Microsoft 365:

1. Open Control Panel > Programs > Programs and Features.
2. Open the list containing Microsoft 365 applications then click the selection for Microsoft 365 and choose Change from the options.
3. First, select Quick Repair from the options then move to Online Repair if the first attempt did not solve the issue.
4. The error resolution needs a computer reboot.

Conclusion – Something went wrong [1001]

In conclusion, “Something went wrong [1001]” Microsoft 365 failure emerges from authentication failures and profile damage while security applications can create further interference. Reaching Microsoft Support or your IT administrator becomes necessary if none of the alternative methods resolve your issue. System updates and appropriate security setting management will minimize repeated errors going forward.

FAQs – Something went wrong [1001]

1. Why does Microsoft 365 keep showing error 1001?

This error typically occurs due to profile corruption, authentication failures, antivirus interference, or conflicting add-ins.

2. Will clearing the OneAuth and IdentityCache folders delete my Microsoft 365 data?

No, clearing these folders only removes outdated authentication data. Your files and settings remain intact.

3. Can Trend Micro Antivirus cause Microsoft 365 authentication issues?

Yes, Trend Micro Antivirus may block the AAD Broker Plugin. Adding an exclusion can resolve the problem.

4. What should I do if none of these fixes work?

If the issue persists, try:

• Using a different user account
• Reinstalling Microsoft 365
• Checking for Windows updates
• Contacting Microsoft Support

5. How do I prevent this error from happening again?

1. Regularly update Microsoft 365 and Windows to avoid any Windows errors like Microsoft Windows App Runtime DDLM” Error
2. Avoid abrupt shutdowns to prevent profile corruption.
3. Keep antivirus settings optimized to prevent software conflicts.