Application/octet-stream ipa
text/xml plist
The installation assets must be accessible from the device, but can be spread across the network in many places. A centralized location to hold all the site’s assets is, however, recommended. In addition, that location must be accessible using HTTP or HTTPS without any type of authentication.
The download page can be customized according to your needs. For example, you could request for credentials when accessing the page, restricting the users allowed to download the application.
Once you have the distribution link set up, you can make the deployment package available in many ways like sending the link by SMS or email, using banners, through JavaScript pop-ups, or by embedding the link in another enterprise applications created by you.
The key element here is to develop traffic towards the distribution link location, to promote SharePlus installation.
Sometimes you need to configure your server so that the manifest file and application IPA file are transmitted correctly.
Using Server administrator credentials, add the following MIME types to the MIME types settings:
Application/octet-stream ipa
text/xml plist
Use the IIS Manager to add the MIME types in the Properties page of the server:
.ipa application/octet-stream
.plist text/xml
For more information on the entire process refer to Distributing Enterprise Apps for iOS Devices.