Moving to a new domain

Hi Machzy

What I would suggest doing is to download all the PBIX files and make a note of the respective App Workspaces, as well as the permissions associated in each App Workspace.

I would then create the same App Workspaces and permissions in the new tenant.

I would then ensure I have got my new On-Premise Gateway setup and working in the new tenant.

I would then upload the downloading PBIX files into the new App Workspaces, and if the Gateway is setup as the previous version they should all connect and work.

Here is the official way to export the PBIX, but does so one at a time

https://docs.microsoft.com/en-us/powershell/module/microsoftpowerbimgmt.reports/export-powerbireport?view=powerbi-ps

Or Rui's blog and PowerShell script is where you can export all the PBIX from an App Workspace

https://ruiromanoblog.wordpress.com/2017/09/28/export-all-pbixs-using-powerbips/