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AADSTS90100: Login Parameter is Empty or Not Valid [Fix]
Discover expert solutions to get rid of the login error
4 min. read
Updated onOctober 4, 2023
updated onOctober 4, 2023
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Key notes
Login errors are common, and most usually have the underlying cause listed, making troubleshooting much quicker. Be it Microsoft Office, third-party applications, or evensign-in issues on Windows, we have all faced these. But one that continues to bother users is AADSTS90100.
The error message reads,Sorry, but we’re having trouble signing you in. AADSTS90100: login parameter is empty or not valid. The problem usually affects Micorosft Office applications, both the desktop and web versions. So, let’s find out all about it and the solutions that work!
Why do I see the error code AADSTS90100?
The error code indicates issues signing in, and the underlying cause is usually localized, i.e., lies at the user’s end. Here are a few reasons you encounter the error:
How do I fix the AADSTS90100 login error?
Before we proceed to the slightly complex ones, here are a few quick solutions you must try:
If none work, head to the fixes listed.
1. Clear the browsing data
That’s it! For most users, simply clearing the browser cache and cookies helped fix the AADSTS90100 Outlook error in no time.
2. Reset the network settings
When faced with the login error AADSTS90100 in Office 365, clearing the network settings to revert any recent changes might do the trick.
3. Create a new browser profile
When facing AADSTS90100 with the web version of an app, creating a new profile should help. It will help eliminate any data corruption and misconfigured settings and, subsequently, provide a fresh start.
4. Repair the affected application
Repairing Microsoft Office can help get rid of AADSTS90100 and several other complex issues. Besides, it will also improve the app’s performance.
5. Reinstall the affected application
Whether it’s Microsoft Office or another application displaying the AADSTS90100 log-in error, reinstalling it works well most of the time. You can easilyinstall Microsoft Officeafter removing it from the PC. And by then, the log-in error should be fixed.
Before you leave, do check some quick tips tooptimize Windows settings for the best performance.
For any queries or to share more solutions with us, comment below.
More about the topics:Fix Login issues,Office 365
Kazim Ali Alvi
Windows Hardware Expert
Kazim has always been fond of technology, be it scrolling through the settings on his iPhone, Android device, or Windows PC. He’s specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
Long-time Windows user, Kazim is ready to provide a solution for your every software & hardware error on Windows 11, Windows 10 and any previous iteration. He’s also one of our experts in Networking & Security.
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Kazim Ali Alvi
Windows Hardware Expert
Kazim is specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
