Why is Teams telling my Dad and I that we are each unavailable? Internet is fine.

Question

When my Dad tries to call me on Teams today, it instantly tells him I am unavailable. He waits, while I try to call him on Teams. It instantly tells me he is unavailable. We have both tried six times. We both have good internet throughout.

We have been talking to each other on Teams for months without trouble.

What should we do?

Answer 1

Hello Gavin Baha, thanks for posting this in the community.

When both users attempt to call each other in Microsoft Teams and the call immediately fails with an “Unavailable” message, this is usually not related to internet connectivity. More often, it points to a Teams service or account state issue, presence or sign‑in cache corruption, an app version mismatch or temporary client malfunction, an account session conflict that can occur after long‑term use, or a calling or license synchronization issue, even when using personal or free Teams accounts.

As a first step, please have both of you restart your computers or mobile devices. This helps clear any background Teams services or sessions that may be stuck, especially if the devices have been running for an extended period of time.

Next, make sure you both fully sign out of Microsoft Teams, as simply closing the app is not enough. After opening Teams, sign out from your profile, close the application completely, wait about two minutes, then restart Teams and sign back in. Once signed in, check your presence status and confirm it shows as Available. Also ensure that neither account is set to Do Not Disturb or Appear Offline. If the presence status does not update correctly, this usually confirms a presence synchronization issue.

If the problem continues, try using Teams on the web at https://teams.microsoft.com. Sign in using the same accounts and attempt to call each other from the browser. If calling works in the web version, the issue is most likely related to the desktop or mobile app cache or version. If it also fails in the browser, the issue may be related to the account or service itself.

Kind regards,

John Oli

Answer 2

It sounds like you and your Dad are experiencing connectivity issues with Microsoft Teams, which can sometimes occur even when the internet connection appears fine. Here are a few steps you can take to troubleshoot the problem:

1. Check Firewall and Proxy Settings: Ensure that the necessary URLs and ports for Microsoft Teams are open in your firewall or proxy settings. This is a common cause of connectivity issues. You can refer to the Microsoft documentation for specific URLs and IP addresses needed for Teams.
2. Update Teams: Make sure both you and your Dad are using the latest version of the Teams app. Older versions can sometimes lead to issues with connectivity and calling.
3. Restart Teams: Sometimes, simply restarting the Teams application can resolve temporary glitches.
4. Check for Service Issues: Visit the Microsoft Teams service status page to see if there are any ongoing issues with the service that might be affecting calls.
5. Try Different Devices: If possible, try making calls from different devices to see if the issue persists.

If these steps do not resolve the issue, consider reaching out to Microsoft Support for further assistance.

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References:

• Troubleshoot connectivity issues with the Microsoft Teams client
• Issues receiving messages and calls on legacy systems