Microsoft Teams is a coveted product in the online interaction space these days. People have been increasingly using it for both, personal and professional purposes. With this heightened usage comes the responsibility to keep their product intact. There have, however, been several incidents of people reporting an error while trying to log into Microsoft Teams via the desktop application.
Coded as Error CAA2000B, there can be several factors that could lead to this error. Today, we will be discussing how to fix this error faced while logging into Microsoft Teams and what all might have caused it in the first place.
It is recommended for users to try and log into Microsoft Teams via the website to make sure that the error is caused by the desktop application.
Fix Microsoft Teams Login issues: We couldn’t sign you in
If Microsoft Teams says, We couldn’t sign you in, then follow these proven tips to fix Microsoft Teams Login issues.
- Restart the Microsoft Teams app on your computer
- Check system time and date
- Clear the cache files of the Microsoft Teams app
- Remove Password from Credential Manager
- Clear browser cache and try again
- Reinstall Microsoft Teams
1] Restart the Microsoft Teams app on your computer
This is a pretty elementary solution but gets the job done more often than not in these cases. Follow the steps below to restart your application cleanly.
Close Microsoft teams from the background and open the Task Manager by search on the Start Menu or with the Ctrl + Alt + Delete shortcut key.
Under the ‘Processes’ tab, search for the Microsoft Teams application and right-click on it.
Further select ‘End Task’.
Try opening up the application again and check if the error has been solved. If not, try out one of the other solutions mentioned below.
Related: Microsoft Teams Error CAA2000B, We weren’t able to register your device.
2] Check system time and date
Check if the time and date on your computer are correct, which can affect the ability to connect to Microsoft Teams.
3] Clear the Cache files of the Microsoft Teams app
Corrupted Cache data files can cause all kinds of errors, including the error in question. The corrupted cache can block authentication certificates which can, in turn, result in certain hiccups while trying to log into an app. Here is how you can clear out the cache data for Microsoft Teams.
Open the Task Manager via the keyboard shortcut key or by right-clicking on your taskbar and further selecting that option and end the task, as was taught to do in the first solution.
Open the File Explorer on your computer and paste the address as prescribed below on the address bar:
This address is going to take you to the location where the cache files for Microsoft Teams are stored. Users can try and locate this section on their own, but it’s generally buried very deep.
Press Ctrl + ‘A’ to select all the files and press Shift + Del keys together to delete all the files. Confirm the process and wait till it has completed.
The process isn’t complete yet as you have to replicate it one by one for all of the following paths too:
Once completed, try logging into Microsoft Teams again and check if the error still persists.
Read: How to add Microsoft Teams Chat Link to Email Signature.
4] Remove Password from Credential Manager
Type “Credential Manager” in the search box, then select Windows Credentials and expand related credential records to remove them.
Related: Fix Microsoft Teams Sign-in Error Codes 0xCAA20003, 0xCAA82EE2, 0xCAA82EE7, 0xCAA20004, 0xCAA90018.
5] Clear browser cache and try again
If you are facing this issue in your browser, then you could clear the browser cache and try again.
6] Reinstall Microsoft Teams
Before you begin with the uninstallation process, you should close the MS Teams application from the background.
Open the Control Panel on your computer. Select to view your icons by Categories and under the Program section, click on Uninstall a program.
Locate MS Teams from the group of programs that you have installed on your computer, right-click on it and select Uninstall. Wait till the process is completed to move onto the next steps.
Open the Run prompt by pressing the Windows + ‘R’ key combination and enter ‘%appdata%’ in the blank space. This will open the Appdata folder, which stores the data for the various applications running on your PC.
In order to ensure that MS Teams has been uninstalled properly and cleanly, you have to locate the Teams folder here, right-click on it, and press Delete.
Open the run command again and this time enter ‘%Programdata%’. This will take you to yet another hidden folder that stores all the program-related settings in it. If you spot an MS Teams folder here too and delete it.
After that process has been completed, you can now visit the Microsoft Store and download a fresh copy of Microsoft Teams.
Apart from the issues we have taught you to troubleshoot below, there can be several other causes behind the error CAA2000B too, like an Outdated version of MS Teams, which may be incompatible with your Windows built or a clash between your Windows credentials.
We believe that one of the aforementioned fixes will help you resolve the error.