Common System Errors

Rather than returning errors in ADAuthenticationErrorDomain, ADOAuthServerErrorDomain, ADBrokerResponseErrorDomain, ADKeychainErrorDomain and ADHTTPErrorCodeDomain (see ADAuthenticationError.h for more details), ADAL could also return errors in system error domains.

Here we create a page to list some common system errors we have seen (the list is not complete and will be updated based on our observation and investigation):

ErrorDomain	ErrorCode	Reason
kCFErrorDomainCFNetwork	310	A connection could not be established to the HTTPS proxy. It should be some issue with customer's proxy settings in system.
kCFErrorDomainCFNetwork	311	The HTTPS proxy returned an unexpected status code. It should be some issue with customer's proxy settings in system.
kCFErrorDomainCFNetwork	306	A connection could not be established to the HTTP proxy. It should be some issue with customer's proxy settings in system.
NSPOSIXErrorDomain	-9858	errSSLHandshakeFail. Most likely it the server SSL issue.