This is a very common question: how can I copy Work Items information from a VSTS account to another account, or between VSTS and TFS. There are many scenarios where such functionality would be useful, but sadly enough, there is no option out-of-the-box in the base product.
If you do not have images or other complex data inside your WI and you do not care to maintain history, you can simply create a query that load all the WI you want to copy, open it in excel with TFS/VSTS integration (be sure to select all columns of interest), then copy and paste into another Excel instance connected to the destination project, press push, and you are done. This is only useful if you do not care about losing images contained in the description of your Work Item and if you do not care about history because Excel is not capable of handling images. https://goo.gl/h5qUsP #DataIntegration #ML
