TFS | TF400324: Team Foundation services are not available | The underlying connection was closed

 Recently I found this interesting issue on one of my AX2012 Dev machine which connects basically to TFS. 

Problem's keywords

• TF400324: Team Foundation services are not available
• The underlying connection was closed

Solution

I found that these following instruction works for my case.

1.      Open up a PowerShell command prompt, running it with elevated privileges

2.      Run the following command for 64 bit applications:

# set strong cryptography on 64 bit .Net Framework (version 4 and above)

Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord 

3.      Run this command for 32 bit applications

# set strong cryptography on 32 bit .Net Framework (version 4 and above)

Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord 

4.      Reboot.

References

• https://stackoverflow.com/questions/51883492/git-tfs-fetch-tf400324-team-foundation-services-are-not-available-the-underl
• https://johnlouros.com/blog/enabling-strong-cryptography-for-all-dot-net-applications
• https://www.anycodings.com/1questions/3075186/git-tfs-fetch-tf400324-team-foundation-services-are-not-available-the-underlying-connection-was-closed