XrmToolkit uses JSON based files to store configuration and metadata information regarding the links between your CRM organization and your Visual Studio Solution. The following 3 files are generated for each solution that is linked in XrmToolkit:
As shown in the image below, these files are created in the same directory and with the same name as your Visual Studio solution:
For more information regarding the contents of these files please see 'XrmToolkit Files'.
This file will need to be checked out from your source control system for edit whenever a change is made regarding your items linked to CRM. Some of these types of changes include: