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[Guide] How to upgrade TFS 2013 to TFS 2015


Today, I am planning to upgrade Visual Studio Team Foundation Server 2013 to Visual Studio Team Foundation Server 2015. Visual Studio Team Foundation Server 2015 is the newest version of Team Foundation Server (TFS), the collaboration platform at the core of Microsoft's application lifecycle management (ALM) solution.
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Team Foundation Server 2015 includes a large number of changes to the schema used in its databases, and as such, an upgrade from TFS 2013 and older releases is expected to take a significant amount of time. Because upgrades are offline, Microsoft is providing a tool, TfsPreUpgrade.exe, which can be used to perform the most time-expensive portions of the upgrade online against TFS 2013 QU4 and QU5 deployments. The Upgrade wizard includes a readiness check, which warns you if your database is large enough that running TfsPreUpgrade.exe is recommended.

So lets start, my current TFS server has TFS 2013 Version 12.0.21005.1 and I am going to upgrade it to TFS 2015. First download TFS 2015 ISO and mount ISO on TFS server.
Before launching TFS 2015 setup, close TFS 2013 Team Foundation Server Administration Console.
Run the Visual Studio Team Foundation Server 2015 installation (tfs_server.exe) and click on Install.
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Setup will take 5 to 10 minutes to complete the installation process and its depend on your system performance.

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Upgrade Wizard opens automatically, at the end of the installation process. In our case we are doing an in-place upgrade,
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Make sure the SQL Server Instance is ok and click on on List Available Databases and tick on “By Checking this box, I confirm that I have a current Backup”

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Provide service account credentials for Application tier and click next.

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Click Next.

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Provide credentials for build agent service and click Next.

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Click Next.

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Make sure the Reporting service SQL Server Instance is ok and click on Populate URL and click Next.

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Make sure the SQL Server Analysis Service Instance is ok and click Next.

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Provide Password for the SQL Report service account:

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In my case I am going to use exiting SharePoint Server, so select “use current SharePoint settings” and click next.

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Review the configuration and check if everything is ok and click Verify.

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The Readiness Check validates that your system us Ready to Configure or not.

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Click on Configure to Configure TFS 2015.

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Now start the Project Collection upgrade.

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Project Collection upgrade process took about 10 minutes to upgrade all the ours Project Collections, in my case  I have just One project collection and one TFS project.

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Click on Close to complete the Upgrade process.

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Open TFS Administration Console and now you can see that the version number is updated to TFS 2015 i.e. (14.0.22824.0)
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