Microsoft Teams is a powerful communication and collaboration platform developed by Microsoft. It allows users to chat, share files, and collaborate on projects in real time.
However, like any other software, it is not immune to errors and issues. In this article, we will discuss how to fix the Microsoft Teams sign-in error code 0xCAA90018 or 0xCAA82EE2.
The error code 0xCAA90018 or 0xCAA82EE2 is a frequent problem that can happen when attempting to log into Microsoft Teams. Users may be unable to use the platform or access their accounts due to this problem.

Ways to Troubleshoot Microsoft Teams Error Code 0xCAA90018 or 0xCAA82EE2 Sign In Issue
Incorrect login credentials, connectivity issues, or problems with the Microsoft Teams program itself are a few of the possible causes of this error. Fortunately, there are a number of measures you may take to analyze and resolve this problem.
Here’s what you need to do to fix Microsoft Teams sign-in error code 0xCAA90018 or 0xCAA82EE2.
#1 – Check your Microsoft Teams Login Credentials
Making sure you are logging into Microsoft Teams with the correct login information should be your first priority. This contains both your login and password as well as any additional authentication measures, like two-factor authentication, that could be necessary. Contact your system administrator or look up your login information in the Microsoft Teams documentation if you are unsure.
#2 – Verify your Network Connection
The Microsoft Teams error code 0xCAA90018 or 0xCAA82EE2 can also occur due to connectivity issues. You need to check your internet connection to fix it. Make sure it is stable and fast enough to support Microsoft Teams. If you are using a wireless connection, you can switch to a wired connection or move closer to your router to improve signal strength.
#3 – Clear the Cache and Cookies of your Web Browser
If you are trying to sign in to Microsoft Teams using a web browser, the error code 0xCAA90018 or 0xCAA82EE2 can also be caused by an outdated or corrupted browser cache and cookies. Clear your browser cache and cookies to resolve the issue and try signing in again. Try following the steps below.
- In your web browser, go to the Settings or Options menu.
- Navigate to the Privacy and Security section.
- Click on the Clear browsing data or Clear cache and cookies option.
- Choose the time range for which you want to clear the cache and cookies. We recommend selecting “All time” to delete all cache and cookies.
- Select Clear data or Clear cache and cookies to confirm.
#4 – Restart the Microsoft Teams App

If you are using the Microsoft Teams desktop app, the error code 0xCAA90018 or 0xCAA82EE2 can also be fixed by restarting the application. Then, try signing in again.
#5 – Check if the User’s Account is Suspended or Deleted
Make sure that you are using the correct username and password to sign in to Microsoft Teams. Try resetting the user’s password and if the user is still unable to sign in, you may need to contact Microsoft Support for further assistance.
Wrapping It Up
In summary, the error codes 0xCAA90018 and 0xCAA82EE2 indicate a connection or account issue for the user. You should make sure your account has not been deleted or suspended, confirm that you are logging into Microsoft Teams with the right username and password, and try changing your password if necessary to resolve this problem.
You may need to check your connection and/or get in touch with Microsoft Support for additional help if the issue continues. You can successfully resolve the problem and recover access to Microsoft Teams by following the solutions above.