Visual Studio Online (TFS as a Service) – What you need to know to get started

You may already have an account, but before moving your company’s code, work items etc. it is important to know what is possible and what the terms and conditions are. Below I have collected some important links:

Introduction:
https://azure.microsoft.com/en-us/services/visual-studio-online/
https://www.visualstudio.com/en-us/products/what-is-visual-studio-online-vs.aspx

Pricing:
https://azure.microsoft.com/en-us/pricing/details/visual-studio-online/

Features Timeline:
https://www.visualstudio.com/news/release-archive-vso

SLA & Terms of Service:
https://www.microsoft.com/en-us/download/details.aspx?id=42290
https://www.visualstudio.com/en-us/support/terms-of-service-vs.aspx
https://blogs.msdn.com/b/bharry/archive/2013/10/14/how-do-you-measure-quality-of-a-service.aspx

Status & Support:
https://blogs.msdn.com/b/vsoservice/
https://www.visualstudio.com/support/support-overview-vs

Migrating:
https://www.visualstudio.com/en-us/get-started/migrate-team-projects-vs.aspx

Users and Azure AD:
https://www.visualstudio.com/get-started/manage-organization-access-for-your-account-vs

Integration & Service Hooks:
https://www.visualstudio.com/integrate/
https://www.visualstudio.com/en-us/integrate/reference/reference-vso-hooks-overview-vsi
https://www.visualstudio.com/en-us/integrate/explore/explore-vso-vsi.aspx
https://blogs.msdn.com/b/slange/archive/2014/08/26/send-email-to-a-team-room-with-vso-service-hooks-and-zapier.aspx
https://www.visualstudio.com/integrate/reference/reference-vso-overview-vsi
https://www.visualstudio.com/en-us/get-started/integrating-with-service-hooks-vs

Backup:
Visual Studio Online utilize SQL Azure, which provides High-Availability and Disaster-Recovery. This is described here https://msdn.microsoft.com/en-us/library/azure/jj650016.aspx

Test & Build – On Premise:
If you don’t want to or cant use the build & test features provided by the service you can connect from both on-premise build and test controllers: https://nakedalm.com/connect-a-test-controller-to-team-foundation-service/ and https://myalmblog.com/2014/04/configuring-on-premises-build-server-for-visual-studio-online/

Feel free to suggest more and I will add them :-)