Azure Repos

By default you can only configure policies on specific branches in Azure Repos. If you're using a strict naming pattern for your branches (Release Flow or GitHub Flow), you may want to set a policy for all future Release Branches, or all Feature branches.

There is no UI to set the security at the Organization level. This is fine if you're happy with the default security settings in Azure DevOps, but if you want certain settings to apply to all projects, then it's sometimes useful to set the permissions at the Organization level.