Use the -includedproperties switch to specify any attributes that are not included in the default request.
In the example below, values are returned for DN and Description, but employeeID returns a blank value:
Get-QADUser johnsmith | Select DN,Description,employeeID
To return a value for employeeID, use the -includedproperties switch, as shown below. DN and Description are already included in the default request, so it is unnecessary to add them:
Get-QADUser johnsmith -includedproperties employeeID | Select DN,Description,employeeID