How to Fix Microsoft Teams Sign-In Error [Solved]

Microsoft Teams is the application that became a necessity after the pandemic began and it has been used by almost everybody for meetings and presentations, lectures, etc. online. But many Windows users have experienced an error while trying to sign in to the Microsoft Teams app on their system.

According to those windows users, they are unable to sign in and the team’s app throws an error message and which is making them frustrated. There might have been several potential reasons and some of the factors are not installing the Microsoft teams properly, changing the settings of teams app unknowingly by the user, unstable internet connection, etc.

After researching those factors, we have come up with a few solutions in this post that might assist the user in resolving this issue and might be able to sign in to the teams app again on the windows system.

Fix 1 – Reset or Repair Microsoft Teams app

When the settings of the Microsoft Teams app gets changed unknowingly by the user or other programs, such errors occur while using the application on the system. Therefore, we suggest users that repair or reset the application through the settings app.

Let us see how this can be done on the windows system with a few steps below.

Step 1: Press Windows + R keys together to open the Run box.

Step 2: Type ms-settings:appsfeatures in the run box and press Enter key to open Installed Apps.


Run Ms Settings Appsfeatures Min


Step 3: In the installed apps page, type Microsoft teams in the search bar.

Step 4: Then, click three horizontal dots of the Microsoft Teams application from the search results as shown in the below screenshot.

Step 5: Select Advanced options from the list as shown.


Microsoft Teams Advanced Options 11zon


Step 6: Go to the Reset section by scrolling the advanced options page.

Step 7: Click either the Reset or Repair button to reset/repair the application as shown in the below image.


Reset Or Repair Ms Teams 11zon


NOTE: Resetting will delete the data from the app, whereas repairing will not.

Step 8: After it is done, close the window.

Now try and check if you are able to sign in to the Microsoft Teams app on your system.

If this did not solve the issue, try our other solutions given below in this post.


Fix 2 – Delete / Clear Microsoft Teams Cache Memory

Any application on the system saves information in its data folder as cache memory, such as sign-in details or other settings. These data can get damaged, or the data can fill up the cache memory. That’s when the user has to clear the application’s cache memory by removing all of the files in the folder as described in the instructions below.

Step 1: Go to the taskbar and click Show hidden icons sign as shown below.

Step 2: Then right-click on the Microsoft Teams app icon on the system tray.

Step 3: Click Quit from the list as shown in the below image.


Quit Ms Teams 11zon


Step 4: Next, open the run command box by pressing Windows + R keys together.

Step 5: Copy and paste the below command in the Run box and press Enter key.



App Data Ms Teams Run 11zon


Step 6: In the opened Teams folder, select all the files by pressing CTRL + A keys and pressing SHIFT + DEL keys together and clicking YES to permanently delete them.


Permanently Delete Data Ms Teams 11zon


Step 7: After deleting them, close the Teams folder.

Step 8: Now press the Windows key and type Microsoft teams.

Step 9: Select the Microsoft Teams app from the search results to open it.


Microsoft Teams Open 11zon


Step 10: Now try and sign in to the teams app on the system.

Fix 3 – Check your Internet Connection

One of the main solutions is to check the internet connection and make sure you have a stable and fast internet connection on the system whenever such an issue arise. We recommend our users that once check their internet connection with the steps given below.

  1. Restart your router once if you are using a Wi-Fi adapter for an internet connection.
  2. If you are using an Ethernet connection, then unplug the ethernet cable from the system and again plug it back in.
  3. Now check if the internet connection is stable or not. If it is still not stable, then contact your internet service provider to get a better connection.

After the connection is stable, check if the problem is resolved or not.

That’s it.

Fix 4 – Check if the Microsoft Teams Server is down

When the user faces any log / sign-in error while using any application on the system, there can be a possibility of having some problem with the Microsoft teams server. Either the server might be down or they are working on some maintenance. So, if any user wants to check if their server is down, then they can visit the webpage by clicking here.

If the server is found to be down or under maintenance then we request users to wait for some time and try again to check if the server is up.

Once the server is up, try and check if you can sign in to the Microsoft Teams app without any issues.

Thank you!

Fix 5 – Use Microsoft Teams Web to access it

It takes time to investigate and diagnose the underlying cause of any application problem before it can be resolved.
In the meanwhile, you can use the Microsoft Teams online web for any urgent meetings until the problem is resolved.

Follow the steps below on how to access Microsoft Teams web online.

Step 1: Open any web browser (Eg: Google Chrome) on the system.

Step 2: Open a new tab on the browser and type the below URL and press Enter key.

Step 3: Then, Enter the Microsoft Account email address and click Next to proceed.


Enter Email Id Microsoft 11zon


Step 4: Enter the Password and click Sign-in.


Enter Password Microsoft Account 11zon


Step 5: Click on the email address to send a code for verification.


Verify Identity Choose Email Id 11zon


Step 6: Enter the code from mail received from the Microsoft account team in your inbox and click Verify.


Enter Code To Verify 11zon


Step 7: Click Yes to stay signed in if it is your own system. Otherwise, click No.


Stay Signed In Question Mark 11zon


Step 8: Now you have signed in to Microsoft teams web app and can start using it for any meetings.


Fix 6 – Re-Install Microsoft Teams on your system

When an application’s installation on the system is not completed properly or is halted in the middle, issues such as sign-in errors, app not launching properly, and so on occur.

As a result, we recommend that users uninstall the Microsoft Teams software and then reinstall it.

Here are some instructions for reinstalling the Teams app.

Step 1: Open Installed Apps page by pressing Windows key and typing installed apps.

Step 2: Then, click Installed apps system settings from the search results as shown below.


Open Installed Apps 11zon


Step 3: Type teams on the search bar and click three horizontal dots (show more options) to see more options as shown below.

Step 4: Select Uninstall from the list.


Search Teams Show More Options Uninstall 11zon


Step 5: Then, click Uninstall to start uninstalling the Microsoft Teams app.


Uninstall Teams 11zon


Step 6: It will uninstall it in a few seconds depending on the system speed and performance.

Step 7: To Re-Install the Microsoft Teams app, go to the downloads page by clicking here.

Step 8: This opens in a new tab.

Step 9: Click Download for desktop to proceed.


Download Desktop 11zon


Step 10: Then, select Download Teams button either for home or small business OR work or school as shown below.


Download Teams For Home Or Work 11zon


Step 10: After it finishes downloading the executable file, open the file as shown below.

Step 11: Perform the on screen instruction carefully for installing the Microsoft Teams app properly without any interruption.

Step 12: Then, open the Teams app and check if the sign-in error still exists.