Migrate Product Backlog Items from TFS 2012 to TFS 2017 - tfs

what is the best way of migrating PBI and associated items from TFS 2012 instance into TFS 2017 instance?
Thanks

You could try OpsHub Visual Studio Online Migration Utility, the free version supports migrate work items with attachments, comments and link traceability:

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TFS Migration from 2012 & 2017 to 2017

We have to upgrade TFS version from 2012 to 2017. The problem we are facing is we have some team projects in TFS 2017 lower environment and some team projects are in 2012 production instance. We want to migrate 2012 team projects and 2017 team projects to a new TFS 2017 production instance under one team project collection. We need some help in defining the upgrade/migration strategy keeping this scenario in consideration. Please let us know if someone can lend help.
It supports to move collections from TFS 2012 to TFS 2017 directly follow the move collection document. You don't need to upgrade your TFS 2012 to TFS 2017 first. It does the upgrading When it attaches to the new TFS instance, just follow theses steps:
Detach the collection
Back up the collection database
Move the collection database
Attach the collection
Configure Features for team projects(option)
Note: The step5 is done when you move TFS 2012 collection. If you move TFS 2017 collection to your new TFS 2017. This step doesn't need to do.
And you want these 2 collection to merge to one collection totally. This is not support currently. There are two many conflicts: changeset numbers, work item IDs, builds,etc. And it also doesn't support to move team project from one collection to another. Here is a user voice about move team projects between collections which has many votes already:
We still plan to evaluate picking this work up and possibly getting it into the following next major release. We’ll provide an update once a decision has been reached.
I'd suggest that you do the migration from TFS2012 to TFS2017 just as described by Microsoft here and after your new TFS2017 is up and running, move the Team Project Collections from your current TFS2017 to the new one which is described here

TFS Upgrade From 2012 to 2015 Retain history

We currently have a TFS 2012 Server which is being replaced by a 2015 server, the aim is to gradually migrate our code from one to the other.
When we do this we would like to maintain the checkin history, labels etc, Looking at similar questions the answer seemed to be to use the integration toolkit, however it looks like it (and its successor the integration platform) do not support TFS 2015.
We are using TFVC rather than git, if that makes a difference.
I don't have much knowledge about the integration toolkit, but I would actually suggest to do the upgrade one Team Project Collection at a time, but moving them separately to a new server with TFS 2015 installed. This way you will keep all history, label etc.
We have done this way back when upgrading from TFS 2010 to TFS 2013. Only obstacle that we had was a collection around 500 GB in size so it took around 16 hours for the upgrade to finish.
The following answer specifies the steps needed to move a collection to another server:
Copy TFS 2012 collection to another server with TFS 2015 Installed
We have used this Migration tool for our Client.
It’s possible to migrate TFS 2012 data to TFS 2015 with all information intact without any system downtime. The premium version of OpsHub Visual Studio Migration Utility (OVSMU) supports migration of projects with TFVC repository from one instance to another. It supports the 2010, 2012, 2013, and 2015 versions of TFS and all versions of Visual Studio Online, including the 2017 version. Along with basic data, you can migrate all workitems with history, comments, attachments, relationships, and source control with changesets, history, labels, comments, etc. You can checkout the details here: https://www.opshub.com/products/opshub-visual-studio-migration-utility/

Migrate specific project from TFS 2012 to 2013

We have a collection in TFS 2012 which contains more than one project.
We are considering to migrate to TFS 2013.
The TFS servers are already up and running.
Is it possible to migrate the data of a specific project in the collection from one TFS server (2012) to the other (2013) or we must migrate the whole collection?
The best way to do it would be to split up the team project in team project collection and then upgrading only the new team project collection. See below for splitting up team project from project collection
http://msdn.microsoft.com/en-us/library/dd936158.aspx
Also, the Tfs To Tfs migration guide will be useful.
http://tfstotfsmigration.codeplex.com/releases/view/37382

How to combine Notion Timesheets for TFS 2010 and TFS 2012?

We have TFS 2010 and TFS 2012 set up. We would like to have notion timesheets display work items from both TFS 2010 and TFS 2012.
We are not scheduled to migrate from 2010 to 2012 for a while so I was wondering if we could just change the stored procedure to pull the data from both TFS 2010 and TFS 2012 databases.
Any ideas?
From the above link it seems that Notion Timesheets integrate with the SSAS cubes in TFS via the TFS Reporting Warehouse Service. Perhaps you can just use a different url?

How can I rename a team project and area paths in TFS?

How can I rename my Team Project that is hosted in Microsoft's Team Foundation Service? And how can I rename the area paths?
Unfortunately it is not possible in TFS 2005, 2008, 2010, 2012, or 2013. However the work to complete this has been done and it is now available on VSO and will ship in TFS 2015.
http://blogs.msdn.com/b/bharry/archive/2015/04/24/team-project-rename-available-on-vs-online.aspx
You can now rename team projects in Visual Studio Online and the upcoming TFS 2015 release: https://www.visualstudio.com/en-us/news/2015-apr-24-vso
The idea status changed to STARTED
Visual Studio Team (Product Team, Microsoft) responded On Feb 27, 2015:
Im am excited to announce that today we are planning to enable project
rename for TFS 2015. We don’t have an ETA yet for Visual Studio
Online.
If you want to see our progress, visit the Future Feature Development
page at http://www.visualstudio.com/en-us/news/release-archive-vso.
Ewald Hofman TFS Program Manager

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