Microsoft Teams seems to have helped put the rivalry between the Redmond giant and Apple on the back burner. Many Mac users are working from home and rely on Teams to complete their work tasks and collaborate with colleagues. All is well when Teams is working as intended. However, there are times when the app doesn’t work properly. In this guide, we’ll discuss Microsoft Teams error code 300 and how you can fix it on Mac.
What Causes Teams Error 300 in Mac?
Teams error code 300 usually occurs after you change your AD (Active Directory) or Teams password. The app fails to flush out the old password preventing you from signing in.
Error 300 basically prompts users to sign in again. But when you hit the Sign in button, the app restarts by itself instead of allowing you to enter your credentials. Uninstalling and reinstalling Teams doesn’t resolve this problem, so pursue the troubleshooting steps below.
Use Teams for Web
If you can’t log in to your desktop app, go to https://teams.microsoft.com/ and try to sign in to your account. Teams for Web is rarely affected by the same glitches that cripple the desktop version. Of course, this is not a solution per se. It’s only a quick workaround that will hopefully allow you to log in to your account and connect with your colleagues or peers.
Log Out of the App
One quick method to troubleshoot this error consists of using the logout option. Simply put, you need to launch Teams, right-click on the app icon in the Dock and then select Sign out.
Wait two or three minutes for the app to recycle completely. You can then try to sign back in and check if that works. Additionally, if this method fails, you may need to close Teams after logging out. So, right-click on Teams, select Sign Out, close the app, launch it again and then log back in.
Basically, by signing out, your Mac flushes the .plist files allowing Teams to sign you in using the new password.
Remove Microsoft-related Passwords
If this error occurs after you change your Microsoft passwords, access the Keychain and remove your Microsoft-related passwords.
Go to the Keychain Access app on your Mac. Click Window and select, Keychain Access in case your keychains aren’t visible.
Then select your Microsoft keychains.
Go to File and select Delete.
Click Delete References.
Restart your Mac and launch Teams again.
Check if you can sign in using your new password without getting error 300.
Clear the Cache
Clearing the cache may help the app to flush your old Teams credentials and files and validate the new password.
Exit Microsoft Teams completely.
Launch Finder and hold down the Option key.
Then click on the Go menu and select Library.
Navigate go to “~/Library/Application Support/Microsoft/Teams/
Open the Teams folder and remove all the files from the following folders: Application Cache, blob_storage, Cache, databases, GPUCache, IndexedDB, Local Storage, and tmp.
Restart Teams again and check if you can log in to your account.
Conclusion
Microsoft Teams error code 300 indicates the app could not use your saved credentials to sign you in. To troubleshoot this issue, log out of Teams, and nuke your Microsoft passwords from the Keychain. Hit the comments below and let us know which method worked for you.
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