Hello, if one of my colleagues creates a trial account, can they move their sheets into their licensed user account once they are a licensed user on our team?
They sure can!
If they're going to be using the same email address for their licensed account after their trial is over—they won't need to transfer any sheets; they'll all stay in the account.
Otherwise, if their licensed account is with a different email address from their trial account, have them follow the steps in our Help Center article: https://help.smartsheet.com/articles/520103-changing-the-sheet-owner#sheet
A paraphrased version of what they need to do:
Check the above help article for the full process.