Here is a combination of fixes to attempt to fix the issue:
Uninstall/reinstall - ensuring to install from web app for newest version
1. Click on the windows icon 
and click on this icon 
2. Open apps (Or System/Apps & Features)
3. In the search bar shown as below, type in “Microsoft Teams”
4. Click on the app and click on “Uninstall”
5. Open your internet browser (Google Chrome, Firefox, Internet Explorer)
6. Copy and Paste this link into the browser:
https://www.office.com/
7. In the website, look towards the top-right end of the screen click on sign in 
8. Sign in with your USJ Credentials (USJ email and Password)
9. At the top-right corner of the screen, there’s a circle with your initials. Click on that
10. Click on “Download the Desktop app” option at the bottom of the menu
After starting the download, there will be a pop-up downloading at the bottom-left of the screen. When it looks like this click on it:
It may ask to make changes and if so, click "yes"
This will guarantee that you’ve gotten the latest version of teams and now try signing in. If this did not solve your issue, try using another solution on this article.
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Deleting Teams cache folder
1. Sign out of Microsoft Teams and Outlook
To sign out of teams, go to your initials 
and click on it
This will bring up a menu and at the very bottom of it, there is an option to sign out
You will have to quit the app as well which is done by looking at the toolbar below, finding teams, right-click and “quit” the app.
To sign out of Outlook, open the app and click on “File”
There will be an option to “exit” at the bottom of the menu which will also sign you out
2. Next to the Windows Icon 
use the search bar and type in “run” and open the app
3. In the app, Copy and Paste this into the search and enter: %appdata%\Microsoft
4. From here, look for a folder with the name “Teams” and delete it.
After doing this restart your pc and try logging back into teams. If this does not work, please try some of the other fixes in the article.
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Using O365 to sign out all connections
1. Open your web browser (Google Chrome, Firefox, Internet Explorer)
2. Copy and Paste this into the search – myoffice.usj.edu
3. Sign in with your USJ Credentials (USJ Email and Password)
Now two things can happen from here:
- It asks for a little more information from you
-This is Office trying to set up 2-factor authentication which will make your account a bit more secure by setting up an extra form of sign in. It has options like security questions or a code send by text. You only have to pick ONE and after setting it up it should open to the main menu
B. Stay signed-in
-Office is asking if you would like to stay signed into your account should you close the website. Always click “No”. While this seems convenient it will cause more issues with signing in especially if you have more than one O365 account. This can confuse the Office and even though you’ve put in the right credentials, it will just sign you back into the last account you were in. To prevent this, just click “No” when this prompt shows.
After these, you should be at the screen that says “Good Morning/Good Afternoon”
4. Look for your initials in a circle or picture at the top-right of the screen, click on it and then click on “View Account”
5. In the tab with your profile name, scroll down and click on the “Sign out of everywhere” option
If the computer asks to make changes to the computer, click on “yes”
After completing this, restart your pc and try logging back into Teams. If this does not work, try using one of the other fixes in the article
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Log out of Word and OneDrive
Word
*You need to be currently working on a document
1. Click on “File” at the top left of the screen and click on “Account” in the menu
2. Below your profile name, there is an option to sign out
OneDrive
1. Look for the OneDrive icon at the bottom right of the screen and Click on the Icon that looks like this:
2. Open Help and Settings and then open “settings” again in the pop up menu
3. Click on “Unlink this pc”
After these change restart your pc and try signing back into teams. If this fails, try another fix from this article.
Also, if it didn't work we have to get your OneDrive back so here's how to re-sync your account:
1. Open your Web Browser (Google Chrome, Firefox, Internet Explorer
2. Copy and Paste this into the search:
myoffice.usj.edu
3. Sign in with your USJ Credentials (USJ Email and Password)
4. At the screen that says "Good Morning/Good Afternoon _____", at the left side of the screen you should see all the apps that office provides to you. Look for a blue cloud and click on it.
5. At this screen, you should see a bunch of tools above the saved documents in the cloud. Click on Sync and when it asks to sync now or use a business account, click on "Sync Now".
6. This will automatically pull your USJ account since you're already signed in. At the screen that says "Your OneDrive folder", click "Next"
7. A pop-up will appear and tell you "A OneDrive folder already exists on this PC". Click on "Use this folder"
8. Now, there are several notifications, just click "Next" and at the last notification click "Later".
You're OneDrive should be linked and re-synced to your pc again.
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Close all office apps via Task Manager
1. In the search bar next to the windows icon 
, type “Task Manager”
2. Click once on any Office app in the pop-up and click "End Task"
Ex. Microsoft Word, Microsoft Excel, Microsoft Teams, Microsoft Powerpoint, etc.
If this solution did not work, please try using the other fixes on this article
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Clean out Credential Manager
1. In the search bar next to the windows icon
search "Credential Manager" and click on it
2. Click on "Windows Credentials"
3. Under "Generic Credentials", search for any entry that involves Microsoft or Microsoft Teams and remove it
After removing all Microsoft related entries, restart your pc and try signing back into teams. If this fails, try another solution in the article.
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Set Teams to run in Compatibility Mode
1. Locate the shortcut to launch MS Teams on your desktop.
2. Right click on the shortcut for Teams, and select Properties from the menu
3. In the Properties window, select the Compatibility tab
4. Under Compatibility Mode, check off the box for 'Run this program in compatibility mode for:'
5. Select Windows 7 under the dropdown menu
6. Click on Apply to save changes, then OK to close the window
7. Try launching and signing into Teams again
NOTE: You may receive an error message when logging in, but Teams should still open and function normally
Should all of these fixes fail, you can try this final option:
In the Desktop app of Microsoft Teams,
- When login screen prompts with your email, type in any email and click sign in.
- When it prompts you with password, click sign in with another account.
- Type in your email and password. It should work now.
Should this fail, it would be best to set an appointment with USJ IT helpdesk. You may contact us @ 860-231-5310 or by making a ticket through our ticketing service by using this link: https://usj.teamdynamix.com/TDClient/1899/Portal/Home/
Click on “Create a Ticket” -> Software and administrative apps -> Software Issues -> Request Software Assistance
Fill out the ticket to the best of your ability and IT will respond ASAP to find a solution.