Fixing Microsoft Office Sign-In After the Account Migration
If Microsoft Word, Outlook, or another Office app won't sign in with your new @students.sbts.edu account, your PC is likely holding on to your old login. Run the SBTS fix tool below, then sign in carefully.
⏱️ About 10–15 minutes🖥️ For Windows 10 & Windows 11🔐 Have your new @students.sbts.edu password ready
Why you're seeing this
Windows keeps a saved copy of your account logins in a feature called Credential Manager. After your Microsoft 365 account was migrated, the Office apps may still be using the saved login for your old account — which produces a sign-in error (often AADSTS50020). The SBTS fix tool below removes that old login so you can sign in cleanly with your new account.
About the tool
The repair tool here is provided by SBTS Campus Technology. Because it's downloaded from the internet, Windows may show a blue “Windows protected your PC” warning the first time you run it — this is normal, and Step 3 shows how to continue. Only download this tool from the official SBTS link below.
About the pictures
The images below are generalized illustrations of the Windows dialog boxes, using placeholder names like [Your Name]. Your real screens will show your own details and may look slightly different depending on your Windows version, but the buttons and choices are the same.
1
Watch the short walkthrough video
This video shows the whole process of downloading and running the SBTS migration tool, which removes the configuration left over from your previous account. It's worth a quick watch before you begin.
The file will land in your Downloads folder unless your browser is set to save elsewhere.
3
Run the fix tool
Open your Downloads folder (or click the download in your browser).
Double-click SBTS-Microsoft365-MigrationFix.exe to run it.
If Windows asks “Do you want to allow this app to make changes to your device?”, click Yes.
Let the tool finish. It runs quickly and then closes on its own.
If you see a blue “Windows protected your PC” screen.
This is Microsoft Defender SmartScreen, and it's expected for tools downloaded from outside the Microsoft Store. Click More info, then click Run anyway. Since this tool comes from SBTS Campus Technology's official link, it's safe to continue.
Generalized view: if SmartScreen appears, click More info → Run anyway.
4
Fully restart your PC
Click Start → the Power icon → Restart. Let Windows boot all the way back up before continuing. (Choose Restart, not Shut down, so the reset takes effect.)
5
Open Microsoft Word
After your PC has restarted, open Microsoft Word — or any other Microsoft Office application, such as Excel or Outlook.
6
Sign in with your new account
When prompted, sign in using your updated @students.sbts.edu Microsoft 365 credentials (your student email address and your new password).
7
Choose “No” at the “sign in to all your apps” prompt
After you sign in, Windows shows a box titled “Stay signed in to all your apps.” At the bottom of that box, click the link “No, sign in to this app only.”
This step is critical. Do not click the blue OK button. Clicking OK lets the old configuration attach to your whole device again and can bring the sign-in problem right back. Always choose “No, sign in to this app only.”
Generalized view: click “No, sign in to this app only” — not the OK button.
That's it. Word should now be signed in with your new @students.sbts.edu account and stay working normally.
Quick help
What does the AADSTS50020 error actually mean?
An Office app tried to sign you in with the saved login from your old Microsoft 365 account, which no longer exists in the SBTS tenant. Running the fix tool and signing in fresh lets the app use your new account instead.
Windows blocked the tool with a blue warning — did I do something wrong?
No. Microsoft Defender SmartScreen warns about any app downloaded from outside the Microsoft Store. Click More info, then Run anyway (see Step 3).
I accidentally clicked “OK” instead of “No.”
If the sign-in problem returns, run the SBTS fix tool again (Steps 2–4), then repeat the sign-in and be sure to choose “No, sign in to this app only.” If it still won't sign in, contact Campus Technology.
Quick recap
Watch the video → download SBTS-Microsoft365-MigrationFix.exe → run it (click Run anyway if SmartScreen appears) → restart → open Word → sign in with your @students.sbts.edu account → at the prompt, choose “No, sign in to this app only.”