His boss 'assured' him that he had her continued support. = His boss 'assured' him of her continued support. = “You have my continued support,” his boss 'assured' him.
You can 'rest assured' [=you can be sure] that these mistakes won't happen again. = 'Rest assured', these mistakes won't happen again.
They are not 'assured of' being paid. [=it is not certain that they will be paid]
(..) -Yes, I am. Which is why I've been able to detect... ...an undercurrent of sarcasm in your voice. I'm now assured our money is in good hands. You don't think this is a very good plan, do you? So there is a plan? I got the impression (..)2006 Casino Royale