Sign-in & Login Problems

Fix Microsoft 365 Cannot Sign Out Previous User on Windows

Maira Mehtab Sep 28, 2026 868 views

Question details

A former employee's account cannot be signed out from Microsoft desktop applications, even after disconnecting the Windows account and reinstalling the software.

Product: Microsoft 365 Apps
Device & OS: Windows
Scenario: Setting up a computer for a new employee after the previous user has left the organization.
Observed behavior: The previous user's credentials remain stubbornly cached and signed into Microsoft 365 apps, bypassing registry scripts, Credential Manager resets, and complete application reinstallations.

Before you start

Ensure you have administrator access to the Windows machine to manage user profiles. Back up any essential local files from the old user's profile to an external drive or cloud storage before proceeding.

Solution 1Recommended

Create a New Windows User Profile

The most effective method to bypass corrupted authentication caches that prevent a Microsoft 365 account from signing out.

When standard troubleshooting steps such as clearing the Credential Manager, running registry scripts, or reinstalling Office fail, it usually indicates that the Windows user profile itself is corrupted. Creating a completely fresh profile ensures a clean slate for the new employee without lingering authentication tokens.

Access Account Settings

Click the Windows Start menu, open 'Settings' (the gear icon), and navigate to 'Accounts'.

Add a New User

Select 'Family & other users' (or 'Other users' depending on your Windows version), then click on 'Add someone else to this PC' and follow the prompts to set up a new account.

Sign In to the New Profile

Log out of the current corrupted profile and sign into Windows using the newly created credentials.

Launch and Authenticate Microsoft 365

Open a Microsoft 365 app such as Word or Excel. You should now be prompted to sign in with the new employee's account.

Remove the Old Profile

Once you have verified that Microsoft 365 operates correctly on the new profile and all data is backed up, you can return to the Account settings as an administrator and delete the old user profile.

Data Preservation: Do not delete the old Windows profile until you are absolutely certain that all important files have been backed up and the new profile functions correctly.

Solution 2

Disconnect the Old Work or School Account

A preliminary check to ensure the Windows operating system is not actively syncing the old organizational account.

Free Microsoft Office alternative

Switch to WPS Office for a Hassle-Free Experience

If persistent Microsoft 365 licensing errors and account caching issues continue to disrupt your device deployments, consider switching to WPS Office. It offers a lightweight, free, and highly compatible alternative that avoids complex account synchronization loops.

1. Download the Installer: Visit the official WPS Office website and click the free download button.
2. Install WPS Office: Run the installer file and follow the straightforward on-screen instructions to set up the suite.
3. Start Creating: Open WPS Office and immediately begin working on your documents, spreadsheets, and presentations without complex sign-in requirements.

Fully compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.Avoids complicated background account sign-out loops and credential caching issues.Lightweight installation that consumes fewer system resources.Free to download and use, providing essential office productivity tools without mandatory cloud accounts.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Microsoft 365 keep logging into the old account?

This typically occurs when authentication tokens become corrupted or deeply embedded within the Windows user profile's registry and Credential Manager, causing the system to bypass standard sign-out commands.

Will uninstalling and reinstalling Microsoft 365 fix account sign-in loops?

In most cases, reinstalling Office does not resolve persistent sign-in issues because the login tokens are stored in the Windows user profile data, not in the core application files.

How do I remove an old Microsoft 365 work account from Windows?

Navigate to Windows Settings > Accounts > 'Access work or school', select the old account, and click 'Disconnect'. If the account refuses to disappear or sign out of apps, creating a new Windows user profile is the best solution.

Login & Account Issues