A customer of ours has purchased their own Smartsheet account. Our account has 1 paid license and ~40 free licenses. All of these individuals are part of groups allowing them access to selected sheets, reports and dashboards. We need to transfer these users to the customer's account while retaining their access to the project workspace on our account.
What is the best method of accomplishing this with the least interruption of their access to the workspace, sheets, reports and dashboards on our account?