Unable to connect to TFS from VS 2013 but can connect from VS 2015

Question

I have a free version of Vs 2015 on my machine and I am able to connect to TFS from it. But recently my IT team installed the licensed version of VS 2013 from which I am unable to connect to TFS. All the projects are developed in Vs2013 hence I need to connect to TFS from VS2013

I can connect to the TFS server via the web browser(both chrome and IE) and through VS2015.

The TFS version is 2013 (Version 12.0.21106.0)

None of the below steps I did had solved the issue:

• Cleared the TFS cache on my system.
• Disconnected TFS from VS2015,rebooted system and tried to connect from VS2013 but no success.
• Cleared my browser history

It throws the below error:

Answer 1

I could fix this , the issue was the firewall was blocking the Port 443 via VS 2013 but was open for VS2015. I am not sure why it did that but when I added the port it worked.

Answer 2

If you could connect to VS2015 and fail with VS2013. This issue may related to your account cache.

Try to remove your office account info which stored in Credential Manager （Control Panel-All Control Panel Items-Credential Manager-Windows Manager）

Also clear TFS and VS cache. Then reconnect to TFS in Visual Studio 2013 and enter your account. If the issue still exists after above, you could give a try with reinstalling VS.