Team Foundation Server 2018 Build agent Capabilities VS 2019
The Visual Studio is generally compatible with newer versions of Team Foundation Server.
You can see the details specified by Microsoft here: Requirements and compatibility.
Only the latest version has "full" compatibility with the latest Team
Foundation Server, because this will be the only client that contains
components that can interface with new features for that release, and
will also be the only client from which you can perform certain
administrative tasks such as creating new team projects.
So, the Team Foundation Server 2018 should be a high level of support VS 2019 not full support.
Team Foundation Server 2018 Agent could not recognize vs2019 and msbuild 16.0 capabilities. Then you could not select the Visual Studio 2019 in the Visual Studio version of VS build task. Because TFS doesn't know how to locate future VS versions
To resolve this issue, you can use MSBuild task instead of Visual Studio Build Step, then specify the location of MSBuild 16.0, it should be:
C:Program Files (x86)Microsoft Visual Studio2019EnterpriseMSBuildCurrentBinMSBuild.exe
Hope this helps.
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