[keycloak-user] AD ObjectGUID User Federation Mappers

I am trying to create a user federation mapper to map the object from Active Directory to an attribute in the JWT. I have successfully mapped other Active Directory attributes but I am unable to the ObjectGUID to map at all. I remembered that the ObjectGUID needs to be converted from a byte array to a string. Does Keycloak take care of that conversion? What is the best way to map the ObjectGUID?