Jan 11, 2017 - 11:02 AM
Apple network security settings (App Transport Security, or ATS) rules were unintentionally applied to the Global HTTP Proxy/PAC file mechanism in iOS 10.2. This will be rolled back in 10.2.1.
As a workaround, moving the PAC file to a properly-configured HTTPS server and updating the PAC URL to reflect the new location will resolve the issue for iPads that have been updated to iOS 10.2. See the following link for instructions on properly configuring an HTTPS server to comply with all ATS requirements: