Problem:
I am unable to connect the Pharos Print App for iOS to my Print Center server and login.
Environment:
Pharos Print App for iOS.
Uniprint - Supported Print Center versions for the iOS App.
Blueprint - Supported Print Center versions for the iOS App.
Information:
Apple prohibits the iOS from connecting to just any old server with an SSL Certificate installed that is being used for the SSL connection, Apple has a list of "allowed" CA (Certifying Authroties) that the Servers SSL Certificate needs to be signed by. This means that if your Print Center server is using the default Self-Signed SSL Certificate an iOS device will not connect to it, or any SSL Certificate not signed by an Apple approved CA.
Apple has a handful of KB Articles that point to the list for each iOS version, below is one of them.
Apples iOS Trusted Root Certificate list
Note: CA is the same as a Trusted Root Certificate.