Assigning users to tasks in Visual Studio Team Services

Question

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%20Team), I can see us both listed as Team Members. I can create backlog items/tasks and assign them to myself. My friend can create backlog items/tasks and assign them to himself. However, we can't assign each other.

Why could this be and any suggestions on how to resolve this?

Answer 1

Don't see the user in the AssignTo drop down list to assign a user to a project Task.

Move forward with few more steps here:

You won't be able to see the user you want to assign in the assign  to dropdown bar. You will only see yourself.

Just type in the dropdown box - the letter of that person you want to assign the task to. As shown below:

You can see the list of users in your VSTS domain.