How to upload a file to a folder present in TFVC repo from an Azure pipelines.yml file

Below the step by step:

1. Prepare Your YAML Pipeline

trigger:
- main

pool:
  vmImage: 'windows-latest'

steps:
- task: PowerShell@2
  inputs:
    targetType: 'inline'
    script: |
      # Set working directory
      cd "$(Build.SourcesDirectory)"

      # Create a sample file
      echo "Hello from pipeline" > newfile.txt

      # Add the file to TFVC
      tf add newfile.txt

      # Check in the file
      tf checkin newfile.txt /comment:"Added via pipeline" /recursive /force /loginType:OAuth /login:.,$env:SYSTEM_ACCESSTOKEN
  env:
    SYSTEM_ACCESSTOKEN: $(System.AccessToken)

2. Important Configuration Notes

• Make sure “Allow scripts to access OAuth token” is enabled in your pipeline settings.
• The agent must have Visual Studio or the TFVC command-line tools installed (tf.exe).
• You must have proper workspace mappings set up for TFVC to know where to check in the file.