In the Sprint 149 Update of Azure DevOps, we added the ability to navigate to Azure Boards directly from mentions in a GitHub comment as well as adding support for Azure Boards within GitHub Enterprise.
For Azure Pipelines we enabled a new feature on GitHub pull requests that lets you run optional checks by mentioning /azp in the comment. You can also require a comment on the pull request from repository contributor before the pipeline will run giving you the ability to review code from unknown users before building.
Azure Boards:
Azure Pipelines:
Azure Artifacts:
Reporting: