Once you have migrated your existing projects, you are able to visualize the reports containing the details of the migration. By default these reports are stored in your local machine but they can also be downloaded directly from Talend Administration Center.
Note that, by default, the Migration Check reports give you details about the compilation status of the Jobs generated in the latest version of the product. Talend offers you the possibility to optimize the migration reports by installing patches in Talend CommandLine in order to know more precisely whether the Jobs were generating successfully in the previous versions. For more information on how to improve the Migration Check report, see the documentation on Talend Help Center.