As Apple requested to use https instead of http for distributing the IPAs over the air, I tried to use dropbox. I followed this solution Enterprise app deployment doesn't work on iOS 7.1 but I'm getting this error:
"Cannot connect to dl.dropboxusercontent.com"
when trying to install the plist through this link: <a href="itms-services://?action=download-manifest&url=https://dl.dropboxusercontent.com/s/56ny312cwdacho7/xxxxx.plist> Install </a>
Thanks in advance.
An IPA (iOS App Store package) is an application archive file that contains an iOS app. In simple words, it is a file that can be installed on iOS devices and used as an application.
While installing your iOS app with an . ipa file, sometimes the app install may fail due to an error within the app. It could also fail in the following cases: if iOS Entitlements Support is enabled for your app, and your app is not signed using an iOS Distribution Certificate.
NOTE : Shared links don’t render HTML content in a web browser
Refer https://www.dropbox.com/help/desktop-web/force-download
Check question
How to force render a file in a browser
EDIT : Reason is you will need to change link url and reupload it :
www.dropbox.com with dl.dropboxusercontent.com inall links
Reupload by making changes in link which are in html and plist file again.Thats it. Enjoy
TOTAL SOLUTION
Needed file for distribution using example link are given below :
Upload your ipa file to Dropbox. And get public link for the ipa.Note : replace www.dropbox.com with dl.dropboxusercontent.com in the link.
Download the manifest.plist - edit the line #14 with the public link of your ipa . Modify other keys as well (bundle-identifier, bundle-version, title) .
Upload the modified manifest.plist to Dropbox and get its public link.
Download the index.html - edit url param at line #8 with public link of your manifest.plist
Hosting using Github. How that can be achieved is explained in following steps

Now you have Download link like https://paresh-navadiya.github.io/install.html/
Refer How to distribute using DropBox by @ oldman's answer and Distribute your iPhone/iPad adhoc builds Over The Air using DropBox
It working 100% percent.
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