Undoubtedly Microsoft Teams is one of the leading collaboration tools because of its features like incredible chat function, first class video calling feature, user can customize app notifications, tremendous security features, one can download other apps to the Microsoft Teams platform and so on.

But despite of getting such amazing features we found that users are not fully contented with Microsoft Teams as several users have complained about Microsoft Teams app won’t let me sign in error while logging into the app. Well if you are too struggling with the same then stay calm and keep scrolling the article till the end. Here in this tutorial we are going to discuss sign-in errors face by the users on different platforms while trying to log in the Teams. So without any further delay let’s get started with the discussion.

What causes Sign-in Errors in MS Teams?

Reason 1: Unnecessary programs running in the background

Reason 2: Corrupted Microsoft Teams Cache

Reason 3: Lack of required permission

Reason 4: Glitches in the Microsoft App itself

Reason 5: Inappropriate date and time settings

You ma also read: How to fix Microsoft Teams failed to get valid credentials and other Sign-in Errors [Solved]

How to resolve Microsoft Teams app won’t let me sign in 

Method 1: Check Microsoft Teams Servers                  

Due to heavy traffic on the server Teams is infamous for server outage. So it’s quite possible that you are facing the sign-in error just because of the server is down or under maintenance. If you found that the server is down due to certain reasons then we suggest you to wait till the server get back to work.

Method 2: Remove MS Teams Cache

You are likely to face the above mention error because of corrupted cache and it is one of the major reasons for facing such kinds of errors. So we recommend you to kindly clear the corrupted cache:

Step 1: First of all close MS Teams app by pressing Windows + R keys to open the Run menu> the type in %appdata%MicrosoftTeams in the box and press Enter key.

Step 2: The command will open File Explorer menu with MS Teams files> then select All folders and files & remove them from one computer

Step 3: Once done then restart Windows 10 and see if the issue resolved or not

Method 3: Close Microsoft Teams from the Task Manager

In this method we suggest you to close the unnecessary programs running in the background. So it’s imperative to close the unwanted programs. To do the same follow the below mention guidelines:

Step 1: On your keyboard press Windows key and search for Task Manager> Press Enter and open Task Manager app

Step 2: Then identify MS Teams from the list>then select the app and click on the End Task option at the bottom.

Lastly reboot the system, open MS Teams and try to sign in.

Method 4: Run MS Teams as an Administrator

Several users have claimed that running Microsoft Teams as an Administrator worked for them, so we suggest you to run Team as an Administrator:

Step 1: First of all click on Windows Search and type Microsoft Teams> then right-click on MS Teams from the search results and select Run as an Administrator

Step 2: After that click Yes in the UAC Prompt

Method 5: Change Date and Time Settings

You are likely to face the above mention error if you have incorrect date and time settings on your PC. In order to tackle the situation you need to adjust the date and time settings.

Here’s how:

Step 1: On your keyboard press Win + X keys, open Settings>Time & Language>Date & Time > Now you need to make sure that Set Time Automatically and Set Time Zone Automatically are ON.

Step 2: If this didn’t works for you, change Set Time Automatically to Off and then click on the Change button to set the time manually. The following panel will open where you can make required changes.

If this does not work change Set time Zone automatically to Off and then from the drop down menu, set your Time Zone manually.

Method 6: Repair Microsoft Teams

In this method we suggest you to repair Windows Teams and to do the same follow the below mention guidelines:

Step 1: On your keyboard press Windows + I keys to open the Settings app> Go to Apps >Apps & features and select Microsoft Teams from the menu

Step 2: Tap on the app and navigate to the Advanced options >from the following menu, find the Repair option under the Reset Menu

Step 3: Then select Repair and let Windows handle the issue in the background

Finally open MS Teams and try to sign in again.

Method 7: Remove Password from Credential Manager

In this method we suggest you to remove credentials related to Office and Teams in Credential Manager. After that type in “Credential Manager” in the search box and then select Windows Credentials and expand related credential records to remove them.

Method 8: Reinstall MS Teams

Several users have claimed that uninstalling and then reinstalling MS Teams can easily resolve the issue. So we suggest you to navigate to Windows 10 Settings> Apps>Apps & features >Microsoft Teams and select Uninstall button

Once done them finally download and install latest Microsoft Teams app from the web or Microsoft Store.

Method 9: Create New User Account

If none of the above mentioned methods works for you then we suggest you to create New User Account and then see if the issue resolved or not.

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FAQs

How to fix Microsoft Teams won’t let me sign in with a different account?

If you are trying hard to sign in Teams with a different account then we suggest you to follow the below mention guidelines:

Step 1: First of all login to Microsoft Teams desktop App on your device and click on the Profile Images

Step 2: Under the drop down option, click on Accounts & orgs button

Here you will see an option to Add a personal account. Tap on this button to add your Microsoft personal account.

You will be shown here if you have already added a Microsoft Account

Once you click on Add Personal Account, you will be prompted to sign in to the MS Teams desktop app with your personal Microsoft account.

Then give your MS Account username and credential and finally click Next

Once you have submitted your credential, you will automatically switch to another account in your Microsoft Teams and desktop Apps.

Microsoft Teams won’t let me sign in as guest, what to do?

Keep in mind that some meetings don’t allow people to join as guests then navigate to Meeting Invite and select Join Microsoft Teams Meeting. Now open a web page, where you will get two choices: Download the Windows app and join on the web instead. If you join on the web, you can use either Microsoft Edge or Google Chrome.

How to fix Microsoft Teams won’t let me sign in on phone?

If you are facing issues while logging into MS Teams on your Phone then you can follow use the following hacks to get past the issue.

Method 1: Reboot your Phone

Before proceeding with the complex methods we suggest you to reboot your device. Rebooting your device will remove the minor glitches from your device and will refresh your Phone OS.

Method 2: Ensure you are using an updated device & Microsoft Teams

If you are using an outdated device then we suggest you to update your device to the latest version. Updating the device will remove glitches from your device and will surely tackle the issue. Once you have updated your device we also suggest you to update Microsoft Teams.

Method 3: Check your Credentials

If you are still facing the same issue then we suggest you to make sure you have entered correct credentials. You are likely to face the above mention error if you are using wrong credentials.

Method 4: Check your Internet Connection

Several users have claimed that they were facing the issue just because of poor internet connection, so it is suggested to check your internet connection.

How to fix Microsoft Teams won’t let me sign in Mac?

Method 1: Delete the Cache files

In this method we suggest you to delete the cache files and to do the same follow the below mention guidelines:

Step 1: Firstly launch Finder, click on the Go menu, and select Go to Folder > then enter ~/Library/Caches/ and press the Go button

Step 2: Now locate and delete the following items;

~/Library/Caches/com.microsoft.teams

~/Library/Caches/com.microsoft.teams.shipit

Step 3: After that remove the ~/Library/Preferences/com.microsoft.teams.plist item

Restart Teams and try to login again, if the issue still persists then go to

~/Library/Application Support/Microsoft/Teams, remove Teams folder, Restart Mac and reinstall Teams.

Method 2: Disable Your VPN

In this method we suggest you to disable Your VPN ad to do the same follow the below mention guidelines:

Step 1: You need to disconnect from Your VPN> Exit teams completely, right-click on the Teams icon in your Dock and select Remove from Dock

Step 2: After that delete the Library\Application Support\Microsoft\Teams folder.

Step 4: Finally launch Teams and Sign in

Method 3: Remove Teams Passwords from Keychain

Step 1: Firstly Exit Teams, launch Finder, navigate to Applications and then click on Utilities > after that go to keychain Access and remove the Teams entries

Note: After that Delete the com.microsoft.teams.HockeySDK item as well, if available on your machine

 Step 2: Finally Restart your Team app, enter your username and password and see if the issue resolved or not.

Method 4: Disable Auto Proxy Detect

Several users have claimed that turning off the Auto Proxy Detect fixed their issue so we suggest you to disable this feature.

Here’s how:

Step 1: Go to Applications, select the Utilities Folder>then navigate to All Messages and then go to Errors and faults and see if there are any proxy errors on the list.

Step 2: If this is the case, tap on your Apple Menu, navigate to System Preferences, select Network and tap on Proxies

Step 3: Now untick the Auto-detect option, launch Teams again and see if you can access your account now.

Method 5: Log in on iOS

If none of the above mentioned methods works for you then we suggest you to sign in to your Teams Account on an iOS device. To proceed follow the below mention guidelines:

Step 1: First of all exit Teams on tour Macbook> launch Teams for iOS on your device

Step 2: After that sign in to your Teams Account using Teams for iOS> finally Restart your Teams desktop app on your Mac

Step 3: Once done then check if the issue resolved or not.

That’s all about Microsoft Teams app won’t let me sign in. We have tried to cover all the related queries regarding Microsoft Sign-in error. We really hope you liked the blog. Thanks for Reading.