Alex Ruben
How to Fix Microsoft Teams Error CAA 2002 on Windows
Troubleshooting Microsoft Teams Error CAA 2002 on Windows
Having issues with Microsoft Teams throwing up error CAA 2002? Yeah, it’s annoying, especially if you depend on Teams for daily chats, meetings, or collaboration. Usually, this error is tied to some sort of connectivity or security snag—like your system’s security protocols not lining up with what Teams expects. Kind of weird, but tweaking a few settings around internet security and resetting the app can often do the trick.
Modifying Internet Settings to Resolve CAA 2002 Error
So, one common cause ropes back to outdated or misconfigured security protocols—TLS versions specifically. Teams needs certain encryption standards to talk securely, and if your PC’s settings are out of whack (say, TLS 1.0 or 1.1 disabled, but Teams still checking those), connection issues pop up. Why it helps: updating these settings gets your system talking in modern security language, which can clear the block.
This applies if Teams suddenly just can’t connect or throws that error after a Windows update or some other network change. Expect: after changing TLS settings, Teams might load faster or stop erroring out altogether. On some setups, it’s weird—just flipping those options on or off and rebooting, and boom, it works. Not sure why it works, but it does.
To do this, go to the Start menu, type “Internet options”, and hit Enter. In the Internet Properties window, click the Advanced tab. Scroll down to find options like use TLS 1.2 and use TLS 1.3. Make sure those are checked. Also, uncheck use TLS 1.0 and use TLS 1.1 if they’re enabled—because of course, Windows has to make it harder than necessary. After that, hit Apply and OK.
To double-check, you can peek into the registry with PowerShell using this command: Get-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server". That’s a bit nerdy, but it helps if you’re troubleshooting at a deeper level.
Usually, updating these settings aligns your system’s encryption protocols with what Teams expects, especially on newer Windows versions or after some updates. Sometimes, older TLS protocols get disabled by default, which causes issues, so toggling them back on temporarily can get Teams talking again.
Repairing or Resetting Microsoft Teams to Fix Persistent Errors
If messing with TLS doesn’t fix it, then repairing or resetting Teams can get through some pretty stubborn glitches. Because, honestly, sometimes the app itself gets corrupted or misconfigured—probably after a failed update or weird install hiccup.
Find Teams in your list of installed programs—Start menu, type “Add or remove programs”. Look for Microsoft Teams, click it, then hit the three-dot menu (the ellipsis), pick Advanced options. From there, you’ll see options for Repair or Reset.
- Click Repair. It’s usually safe, doesn’t delete your login info or settings, and tries to fix whatever’s broken behind the scenes.
- If that doesn’t help, hit Reset. This wipes the app data, sign-ins, basically resets everything back to default, which can sometimes clear out the cause of error CAA 2002.
Another trick is launching Teams with the --reset-cache flag. To do that, open Run (Windows + R), then type explorer C:\Users\YourUsername\AppData\Local\Microsoft\Teams. Rename the cache folder to something backup. Then, run Teams.exe --reset-cache from a command prompt. Weird one, but sometimes clearing out cached data helps fix weird connectivity errors.
Just make sure to restart your PC after messing with these settings — Windows isn’t always quick to catch up otherwise.
People report that doing a reset or repair straight-up clears up error CAA 2002, especially when network fixes don’t hold. It’s kinda like giving Teams a fresh start, especially if something got corrupted or stuck during an update or install. And yes, sometimes this process takes a few tries or needs a system restart to kick in properly.
Once everything is reset, reopen Teams and it should behave. No more error. Hopefully, this speeds up troubleshooting for anyone dealing with similar quirks. Just something that worked on multiple machines and saved a few hours down the line.