Apple will change the way the enterprise application is authenticated on iOS 9, but when I check our application in Settings - General - Profiles, I got this 
I checked the log:
Oct 15 21:32:21 Nix-iPhone online-auth-agent[216] <Error>: Caller does not have required entitlement 'com.apple.private.mis.trust.set' Oct 15 21:32:21 Nix-iPhone online-auth-agent[216] <Error>: SecTrustEvaluate [leaf AnchorTrusted] Oct 15 21:32:31 Nix-iPhone online-auth-agent[216] <Notice>: Server returned no data Oct 15 21:32:31 Nix-iPhone online-auth-agent[216] <Notice>: Could not complete online authentication Oct 15 21:32:31 Nix-iPhone online-auth-agent[216] <Warning>: session error: The request timed out. Oct 15 21:32:31 Nix-iPhone Preferences[223] <Warning>: Failed to verify provisioning profile d43b2b57-8def-4c46-88c9-fc57503890ad with error 32 Oct 15 21:32:31 Nix-iPhone Preferences[223] <Error>: SecTrustEvaluate [leaf IssuerCommonName SubjectCommonName] Oct 15 21:32:31 Nix-iPhone Preferences[223] <Notice>: Authorization is pending. Oct 15 21:32:31 Nix-iPhone Preferences[223] <Error>: SecTrustEvaluate [leaf IssuerCommonName SubjectCommonName] Oct 15 21:32:31 Nix-iPhone Preferences[223] <Notice>: Authorization is pending.
Does anyone know the reason and how to fix it?
Also tried VPN, because I'm in China, but didn't work ...
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