They are the angels of the resurrection.  Archangels are one of the few groups of local universe personalities who are not normally under the jurisdiction of Gabriel.  The archangel corps of Nebadon is directed by the first-born of this order.  They are counted in the group of Universe Aids.  They are also counted in personality registers.  At the time of the last registry there were 800,000 in Nebadon. 
The seventh group of the encircling Salvington worlds, with their associated satellites, is assigned to the archangels.  In Urantia there is the inusual fact that a divisional headquaters of archangels has been maintained. 
They are not in any manner concerned with the routine administration of the universe, being dedicated to the work of creature survival and to the furtherance of the ascending career of the mortals of time and space.  They were who sent the message naming Andon and Fonta and registering Urantia as an inhabited world of human beings.  The chief of the archangel corps sent from Salvington the message to Life Carriers recognizing life with will on Urantia.  No one of archangels went astray in Lucifer rebellion. 
During fusion process with Thought Adjuster, one who speak the confirmation sentence is an archangel: “This is a beloved son in whom I am well pleased.”.  They are who absolve destiny guardians if subjects fail to survive. 
They are in charge of supervising the direct translation from the morontia temple on the planets in light and life to the resurrection halls. An archangel is destined on the planet for this task.  They were in charge of the dissolution of the mortal remains of Jesus after his resurrecttion. 
See also: UB 37:3.