Now that TFS in the cloud or Visual Studio Online has gone to general availability. There are customers out there that might be rethinking the use of Visual Studio Online and would like to move to an on-premise solution.
If you are thinking that way, take advantage of this Data Export tool supplied by Microsoft while it lasts. The excerpt below is part of an article about the General Availability of VSO. There is a link to it from your VSO home page under news.
Data Export Window
Many of our users started out with VS Online before we’d painted much of a picture of what the future would look like. Some group of them may want to take this transition to GA as an opportunity to reconsider their ALM configuration and move to an on-premises TFS server. Starting today, we’re enabling a data export window for any customer that has been on the service and wants to “opt out”. For the next 6 weeks, you have the option to export your data from Visual Studio Online in a format that can be imported to Team Foundation Server 2013 Update 2. In order to get access to the export capability, contact customer support (vsoexportsupport@microsoft.com) and we’ll be sure to get it switched on right away and provide you instructions on what to do.
From what I have read on the ALM email thread. This is the best option, better than the TFS integration tools. It will get all your Data including work items and source control history, and is much higher fidelity than the migration toolkit.
It will only be around for 6 weeks so if you are planning this move get on it.