How to Fix Office 365 Opening to a Blank Window and Sign-in Stuck
Question details
The user is unable to access Office 365 applications because the program opens to a blank window, the sign-in process is stuck on "Trying to sign you in," and older documents appear to be missing.
- Product
- Microsoft Office 365
- Device & OS
- not provided
- Scenario
- Attempting to launch Office 365 or log into the web version to access, view, or edit documents.
- Observed behavior
- Office 365 displays a completely blank window, sign-in is stuck in an endless loop, and previously saved documents cannot be found.
Verify your internet connection and check the Microsoft 365 Service Health dashboard to ensure there are no ongoing server outages causing sign-in failures.
Verify Account Details and Check OneDrive
If your documents appear missing and you are experiencing sign-in glitches, you may be logged into or trying to access the wrong Microsoft account.
Many users have multiple email addresses associated with different Microsoft services. Verifying the correct account is the fastest way to recover your missing files.
Open a web browser and navigate directly to the official OneDrive or SharePoint website rather than using the desktop application.
Attempt to sign in using all email addresses you have previously used for Microsoft services or Office subscriptions.
Once logged in, navigate to the 'Recent' files section to see if your missing documents appear under that specific account's history.
Clear Browser Data and Use a Private Window
If the sign-in remains stuck on "Trying to sign you in" on the web version, corrupted browser cookies may be causing the loop.
Check Microsoft Service Health
Occasionally, a blank screen and stuck sign-in prompt are caused by widespread Microsoft server issues rather than a local device problem.
Switch to WPS Office for a Stable, Offline-Friendly Experience
Tired of relying on cloud sign-ins and server availability just to access your work? WPS Office offers a highly compatible, offline-friendly alternative that doesn't force mandatory account sign-ins to view or edit your local documents. Avoid the blank screen login loops and enjoy a stable workspace.
Frequently Asked Questions
Why does Office 365 show a blank white screen on startup?
A blank screen usually occurs due to an authentication error, a corrupted browser cache, or an active server outage preventing the login interface from fully loading.
Are my missing Office documents permanently deleted?
Most likely not. Your documents are often saved to the OneDrive of a different Microsoft account. Make sure to log in with all possible email addresses you use to locate your files.
How do I bypass the 'Trying to sign you in' loop?
If using the web version, access Office in an Incognito/Private browsing window or clear your browser cookies. For desktop apps, repairing the Office installation or clearing your Windows Credential Manager can resolve the loop.
