are you using the right Application-Link? You can create it here for the iOS Devices: http://itunes.apple.com/linkmaker
For Example the McAfee EMM App Link. Try this one: https://itunes.apple.com/us/app/mcafee-enterprise-mobility/id322111072?mt=8&uo=4
Tell me if it worked or if you are already using this links.
nope didn't work. I tried creating the link using linkmaker and added to Package as App Store Application. But when I try to open the app on EMM App it just redirects me to Safari and stuck. It doesn't even load the page etc.
What happen when you open the Link (out of a Mail for excample) manually?
Is the Apple Appstore non blocked in your restrictions? If it's blocked the link cannot forward you to the AppStore.
Maybe try to create a new package in the EMM Server with the IOS Appstore Applications and connect it to your user.
It should work if there is no bug in the EMM Server Software.