RESOLUTION:
You can install the product on multiple machines to run at the same time.
Please note we don't share the licence with multiple MNSP machines.
However, It is not recommended to run multiple migration job at the same time.
Especially if the jobs share same Notes data source or SharePoint target.
We suggest you schedule the jobs to run on only one machine.
Best option is to have separate licenses on separate machines
with separate jobs then.