How to migrate from TFS 2015 to Azure DevOps 2022

Question

How to migrate from TFS 2015 to Azure DevOps 2022

Cavalier, Michael CTR (FAA) 0

I have been using TFS 2015 for several years. I recently installed Azure DevOps 2022 on a new server. I am trying to connect from Visual Studio 2015 to Azure DevOps using https.

I cannot add the server. I do not get a prompt for a user name and password, which I expect. The server is not on the same domain as the computer with Visual Studio 2015.

I enter the fully qualified name for the server and select HTTPS. Regardless of what I put in the “Path” text box, I am never asked for a user name and password. I am asked for a user name and password when I attempt to use the (Azure DevOps) website for the server. I think that the user name/password authentication is the issue, but I am not sure. I know only that I cannot connect using HTTPS to the server on a different domain.

How can I connect from Visual Studio 2015 to Azure DevOps on a different domain using https?

Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2023-06-15T10:21:06.35+00:00

Hello @Cavalier, Michael CTR (FAA),

Welcome to Microsoft Q&A forum.

Is the identity dialog box for name/password authentication hidden in the background or be blocked by any process/program on your machine?
Cavalier, Michael CTR (FAA) 0 Reputation points

2023-06-15T11:44:13.89+00:00

I do not see a dialog. The error message states "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel". However, I can connect to the website when I use a browser. In Google Chrome, I get a "Not secure" message in the address bar, but I can proceed to the web page. This is after getting an initial message of "Your connection isn't private" and "NET::ERR_CERT_AUTHORITY_INVALID", choosing "Advanced", then selecting Continue (unsafe) and providing a user name and password for the other domain. The certificate that I use was provided by the FAA IT department. I work as a contractor for the FAA.
Cavalier, Michael CTR (FAA) 0 Reputation points

2023-06-15T11:44:48.2833333+00:00

Duplicate post

1 answer

Your answer

Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2023-06-15T10:21:06.35+00:00

Hello @Cavalier, Michael CTR (FAA),

Welcome to Microsoft Q&A forum.

Is the identity dialog box for name/password authentication hidden in the background or be blocked by any process/program on your machine?
Cavalier, Michael CTR (FAA) 0 Reputation points

2023-06-15T11:44:13.89+00:00

I do not see a dialog. The error message states "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel". However, I can connect to the website when I use a browser. In Google Chrome, I get a "Not secure" message in the address bar, but I can proceed to the web page. This is after getting an initial message of "Your connection isn't private" and "NET::ERR_CERT_AUTHORITY_INVALID", choosing "Advanced", then selecting Continue (unsafe) and providing a user name and password for the other domain. The certificate that I use was provided by the FAA IT department. I work as a contractor for the FAA.
Cavalier, Michael CTR (FAA) 0 Reputation points

2023-06-15T11:44:48.2833333+00:00

Duplicate post

Answer 1

Tianyu Sun-MSFT 34,441 Microsoft External Staff

Hi @Cavalier, Michael CTR (FAA),

Thanks for your reply.

Please try to configure .NET Framework to support strong cryptography to use TLS 1.2 and check if it works.

Press Windows key + R > type regedit > navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319 > add a new registry entry and name it SchUseStrongCrypto > set its type to DWord > set its value = 1

See this document: Configure for strong cryptography for details.

Feel free to let us know the results.

Best Regards,

Tianyu

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Cavalier, Michael CTR (FAA) 0 Reputation points

2023-06-21T11:32:03.29+00:00

I get the same result after changing the registry.
Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2023-07-05T09:12:02.3533333+00:00

Hi @Cavalier, Michael CTR (FAA),

Did you also try to change the default TLS version which is mentioned in this document: Configure for strong cryptography?

The related command line to change the .NET Framework default TLS version should be like following:

reg add HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319 /v SystemDefaultTlsVersions /t REG_DWORD /d 1 /f /reg:64

reg add HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319 /v SystemDefaultTlsVersions /t REG_DWORD /d 1 /f /reg:32
Cavalier, Michael CTR (FAA) 0 Reputation points

2023-07-05T13:03:16.4233333+00:00

The only differences between what I had on my client and the instructions were the following keys, which I added:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.NETFramework\v2.0.50727]

"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.NETFramework\v4.0.30319]

"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft.NETFramework\v2.0.50727]

"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft.NETFramework\v4.0.30319]

"SchUseStrongCrypto"=dword:00000001

After adding these keys, the error message that I received was "TF31002". Note that no log dialog was presented.
Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2023-07-07T14:05:32.4766667+00:00

Hi @Cavalier, Michael CTR (FAA),

Thanks for your reply.

You are right, probably the authentication/account is the issue. For TF31002 error, please check if this document: TF31002: Unable to connect helps. In case the root cause is related to authentication, and you follow above document, but the error persists, I recommend also submitting a ticket on our Developer Community – Azure DevOps for further help.

Share via

How to migrate from TFS 2015 to Azure DevOps 2022

1 answer

Your answer