Use this guide to upgrade to Team Foundation Server 2012.
You’ll find step-by-step guidance here that covers the most popular upgrade tasks, including in-place upgrades and upgrades that involve moving to new hardware. Direction on what to do with SharePoint, whether it’s running on the same server as TFS or somewhere else. We’ll also walk through upgrade of a build machine, as well as adding new features to your upgraded team projects.
Review the requirements listed here and then choose a server upgrade path. You can upgrade from any of the following earlier releases:
Team Foundation Server 2012, including the developer preview, BETA, or RC releases
Team Foundation Server 2010, with or without Service Pack 1
Team Foundation Server 2008 with Service Pack 1
SQL Server: Before you start your upgrade, you might have to upgrade SQL Server to meet new Team Foundation Server requirements. SQL Server 2008 is no longer supported. SQL Server 2008 R2 and SQL Server 2012 are supported.