I\'ve just joined my friend\'s Team Services account (free for the first 5 users account). If I visit the home page (https://XXXXXXX.visualstudio.com/Development/Development
In VSTS, if you do not see the user in the AssignTo drop down list to assign a user to a project Task, you just need to take a few more steps.
I don't see the user I want to assign the task to, in the assign to dropdown. I only see myself

all you need to do, is type a few letters of the person you want to assign the task to, in the dropdown box. You will see a little search magnifying glass

if you click the search magnifying glass, you will see the list of users in your VSTS domain.
