Teams login error code Caa7000


If you try to log in to Teams and get the error code caa7000, then there is a high chance that your connection to Teams servers is not optimal. In this article, we will help you test your network connection and determine how best to resolve any problems.

In summary,

  • You are on Windows machine
  • Unable to access Teams on the web app
  • Getting an error when accessing Teams desktop or web





With Teams becoming more and more popular so as overlooked basic SaaS configuration. Consequently, Teams login issue and error code caa7000 are becoming more common.

Check your machine’s TLS

  1. Open Internet Explorer.
  2. Go to the Tools menu.
  3. Select Internet Options.
  4. Select the Advanced tab and scroll down to the Security section.
  5. Check to see if you have TLS 1.1 enabled, TLS 1.2 enabled (checked). If not, check the box to enable it.
  6. Select OK.
  7. Close Internet Explorer
  8. Restart your machine and try again to login to Teams app


Check your custom domain’s DNS status

In this section, perform a look up using the URL below.

  1. Copy the URL address
  2. Re-write the last part (YOURDOMAIN.COM) with your custom domain name

  3. Finally paste it on your browsers.

  4. Analyze the results if you are seeing identical screenshot as below


  5. If the result is identical to the screenshot, follow this post to resolve the issue with your service’s autodiscover. You should go directly to Re-deploy Skype for Business Online services on your domain section

  6. In addition, sign in and run Lync Test Connectivity web tools by MSFT.

  7. if you see failures in the results, add SfBOL’s SRV and CNAME records to your DNS host.

  8. Wait for about 1-2 hours progpagation (Check with DNS service provider how long)

  9. Perform again step 6 and check for errors

  10. If you don’t see any errors, restart your machine and try again to login to Teams app

Check if Teams apps and sub-services are enabled

  1. Access this link using your Global Admin account
  2. Navigate to all All apps
  3. Make sure that the sub-services below are enabled
    Microsoft Teams Web Client
    Microsoft Teams
    Microsoft Teams AuthSvc