OneDrive File Issues

Fix OneDrive Add Account Opens File Explorer Instead of Sign-In

Kushani Nimanthika Oct 10, 2026 870 views

Question details

The user is unable to add a new account to the OneDrive Windows client because selecting 'Add Account' unexpectedly opens File Explorer instead of the Microsoft sign-in window.

Fix: OneDrive Add Account Opens File Explorer Instead of Sign-In

Product: Microsoft OneDrive
Device & OS: Windows
Scenario: Attempting to add an additional work or school account to the desktop OneDrive sync client.
Observed behavior: The sign-in window fails to appear, and Windows File Explorer opens automatically instead.

Before you start

Count the number of work or school accounts you currently have synchronized with your OneDrive client before attempting to troubleshoot the application.

Solution 1Recommended

Verify the OneDrive Account Synchronization Limit

Check if you have reached the maximum allowed limit of synchronized OneDrive accounts on a single Windows client.

The Windows OneDrive app has a strict limitation: it can only synchronize up to nine OneDrive for Business (work or school) accounts simultaneously. When this limit is reached, clicking 'Add Account' glitches and opens File Explorer rather than prompting you to sign in.

Open OneDrive settings

Click the OneDrive cloud icon located in your Windows system tray (bottom-right corner of the taskbar), click the gear icon, and select 'Settings'.

Count connected accounts

Navigate to the 'Account' tab and count the number of work or school accounts currently listed. If you see nine accounts, you have hit the maximum limit.

Unlink an existing account

To add a new account, you must first remove an old one. Click 'Unlink this PC' under one of the existing accounts you no longer need to sync, then attempt to add your new account.

Verify the OneDrive Account Synchronization Limit

Account Limitation: This limitation of nine accounts applies specifically to OneDrive for Business (work or school) profiles.

Solution 2

Reset the OneDrive Client

If you have fewer than nine accounts, resetting the OneDrive client can resolve unexpected UI glitches preventing the sign-in window from appearing.

Solution 3

Create a New Windows User Profile

Create a new local user account to bypass profile-level corruption that might be interfering with OneDrive.

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Frequently Asked Questions

What is the maximum number of OneDrive for Business accounts I can sync?

The Windows OneDrive desktop client supports synchronizing up to a maximum of nine work or school accounts at the same time.

Why is my OneDrive opening File Explorer instead of the login screen?

This is a known client behavior when you reach the nine-account limit for work or school accounts. Instead of displaying a proper error message, the client fails to load the sign-in prompt and defaults to opening File Explorer.

How do I fix the OneDrive sign-in issue if I have fewer than nine accounts?

If you have not reached the account limit, the issue might be caused by a corrupted application cache or Windows user profile. Resetting the OneDrive client via the Run command or creating a new Windows user profile usually resolves the problem.

Document & File Issues