Recommend an application to provide communication for a globally distributed development team that meets these requirements: separate project team channels with persistent chat history; client apps for Windows 10, macOS, iOS, and Android; ability to add external contractors and suppliers; and direct integration with Azure DevOps. Which application should you recommend?

Microsoft Teams is the ideal solution because it directly addresses all requirements. It offers persistent chat history within separate channels for project teams, has client applications for Windows 10, macOS, iOS, and Android, allows guest access for external contractors and suppliers, and provides robust direct integration with Azure DevOps for notifications and collaboration. Microsoft Project is a project management tool, not a communication platform. Bamboo is a continuous integration/continuous delivery server, not a team communication application. Microsoft Lync is an outdated communication platform, superseded by Skype for Business and then Teams, and lacks the modern integrations and cross-platform support required.