Hi Brian
With the velocity of Office 365 usage, migration of Project Online from one tenant to another is growing, this is a good time to discuss again tenant migration in this blog (suggestion of idea).
QUESTION: I do not see the point with the lookup table option quoted here: what is the trick behind ? does this help filling the lookup values to use non lookup field instead ? and then re set the customed fields with a value and set the values in the lookup list and reset the customed field with this lookup list in the destination?
In the tenant migration I prepare, I just thought to set manually the lookup up table as a strict copy of the source lookup table to migrate. As such, no issue should appear at the migration stage, when importing projects.