You can easily install the apps once followed the below steps,
1. IPA file (app.IPA)
2. Plist file (app.plist)
3. Web server
4. Large icon(512x512) & icon(57x57) png images
Using attached profile, build & create IPA and PLIST file.
Product -> archive
When you create IPA last step, it'll ask this build is for enterprise app, here need to tick Save for Enterprise Distribution , then popup will come like attached screen.
We need to enter IPA URL, title, large & small image URL & PLIST will be generated automatically.
These IPA file & PLIST files have to upload in web server.
For example :
Application URL : https://examplesite.com/app.IPA
Title : App Title
Large Image URL : https:// examplesite.com /512x512.png
Small Image URL: https:// examplesite.com /57x57.png
Step 2 :
Upload image files(57x57.png & 512x512.png), app.IPA and app.plist on web server
Step 3 :
For IIS, use IIS Manager to add the MIME type in the Properties page of the server:
In web page, need to add link for downloading app
The above link need to give url of uploaded manifest file.
Now can click on "Install App" link & install the app on iOS devices.