qlikview server setting-> check dms authorization and
directory service connector
click on + sign
there you have one custom directory option create user and password.
you have to assign each user for each application present in the user document.
qemc->userdocument -> click on one application->authorization->add users
hope this helps
As bbt mentioned this is a license limitation. It seems that your organization used SBE( Small Business Edition). In this server the DMS mode is disabled. So if you want to use DMS mode then you need to contact QlikView account manager for help in updating the licenses.