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How to Fix Microsoft Account and Outlook Signing Out Repeatedly
Question details
Users are experiencing continuous, repeated sign-outs from their Microsoft Account and Outlook, accompanied by authentication and database errors that local fixes do not resolve.
- Product
- Microsoft Outlook / Microsoft 365
- Device & OS
- Windows
- Scenario
- Attempting to stay logged into Microsoft Office applications, specifically Outlook and Teams, for daily workflow.
- Observed behavior
- Accounts sign out repeatedly, displaying AAD Broker Plugin, Teams authentication, or OST database errors, even after clearing credentials or reinstalling the Windows operating system.
Before escalating this issue, ensure you have gathered relevant Event Viewer logs and noted any specific error codes related to the AAD Broker Plugin or OST files to provide to the support team.
Contact Microsoft 365 Support or Your IT Administrator
Because local troubleshooting steps like reinstalling Windows and clearing credentials fail, escalating to Microsoft Support or your organization's IT admin is necessary to fix deep backend profile issues.
Repeated Microsoft account sign-outs accompanied by AAD Broker Plugin or OST errors typically point to a deeper user profile corruption or backend server synchronization failure.
To properly diagnose this, Microsoft engineers or your IT team will need to inspect your logs and investigate the backend services.
Open the Windows Event Viewer and export the logs related to recent authentication failures and Outlook crashes. Collect any specific error codes you have encountered.
Locate your Outlook OST file path and take note of its size or any synchronization warnings, as this data will help support investigate the database integrity.
Contact your organization's IT administrator directly. If you have admin privileges, log into the Microsoft 365 or Teams admin center and submit a formal Microsoft 365 service request, attaching your collected logs.
Try WPS Office for a Hassle-Free Experience
If persistent Microsoft 365 authentication issues and repeated sign-outs are disrupting your workflow, consider switching to WPS Office. It provides a lightweight, highly compatible, and free environment for editing documents without the complex backend authentication dependencies of Microsoft Office.
- 1. Download WPS Office: Visit the official WPS Office website to download the free installation package for your operating system.
- 2. Install the Suite: Run the installer and follow the on-screen prompts to set up WPS Office on your device in just a few minutes.
- 3. Open Your Files Seamlessly: Launch WPS Office and directly open your existing Microsoft Office files without worrying about formatting loss or mandatory account sign-ins.
Frequently Asked Questions
What is the AAD Broker Plugin error in Windows?
The AAD Broker Plugin is an authentication component for Microsoft Azure Active Directory. Errors within this plugin usually cause Microsoft 365 applications like Outlook and Teams to fail during login or repeatedly prompt for credentials.
Why does my Microsoft Account keep signing out even after clearing credentials?
If the issue stems from backend profile corruption, server-side policies, or deep OST database issues, local credential clearing or even reinstalling Windows will not resolve it. Escalation to an IT administrator or Microsoft Support is required.
Can a corrupted OST file cause Outlook to sign out repeatedly?
Yes. The Offline Storage Table (OST) holds your synchronized mailbox data locally. Severe corruption or synchronization failures in the OST can trigger constant app crashes and prompt repeated authentication requests.
