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Hello Experts,I am a freshmen on this forum and this is my first post ever trying to make an app for automating my daily tasks.Am trying to make SOAP-AXL API Calls to a Cisco Unified Communications Manager Server (CUCM) - a Cisco PBX solution which is clustered over two separate servers in a Sandobox environment and am getting the following error:2019-09-18 00:03:34.378643-0400 ISAAC[50696:8444111] ATS failed system trust2019-09-18 00:03:34.378712-0400 ISAAC[50696:8444111] System Trust failed for [1:0x6000026d8480]2019-09-18 00:03:34.378773-0400 ISAAC[50696:8444111] TIC SSL Trust Error [1:0x6000026d8480]: 3:02019-09-18 00:03:34.380320-0400 ISAAC[50696:8444111] NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9802)2019-09-18 00:03:34.380410-0400 ISAAC[50696:8444111] Task <C489A161-B1A7-4785-9382-D5C900AA603C>.<1> HTTP load failed (error code: -1200 [3:-9802])2019-09-18 00:03:34.380518-0400 ISAAC[50696:8444113] Task <C489A161-B1A7-4785-9382-D5C900AA603C>.<1> finished with error - code: -1200Optional(Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made." UserInfo={NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x6000021c4900>, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9802, NSErrorPeerCertificateChainKey=( "<cert(0x7fbba7807e00) s: hq-cucm-pub.abc.inc i: hq-cucm-pub.abc.inc>"), NSUnderlyingError=0x600001d427c0 {Error Domain=kCFErrorDomainCFNetwork Code=-1200 "(null)" UserInfo={_kCFStreamPropertySSLClientCertificateState=0, kCFStreamPropertySSLPeerTrust=<SecTrustRef: 0x6000021c4900>, _kCFNetworkCFStreamSSLErrorOriginalValue=-9802, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9802, kCFStreamPropertySSLPeerCertificates=( "<cert(0x7fbba7807e00) s: hq-cucm-pub.abc.inc i: hq-cucm-pub.abc.inc>")}}, NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made., NSErrorFailingURLKey=https://hq-cucm-pub.abc.inc:8443/realtimeservice2/services/RISService70?wsdl=, NSErrorFailingURLStringKey=https://hq-cucm-pub.abc.inc:8443/realtimeservice2/services/RISService70?wsdl=, NSErrorClientCertificateStateKey=0})A few things that I have already tried:1) ATS settings: <key>NSAppTransportSecurity</key> <dict> <key>NSAllowsArbitraryLoadsForMedia</key> <true/> <key>NSAllowsLocalNetworking</key> <true/> <key>NSAllowsArbitraryLoads</key> <true/> <key>NSAllowsArbitraryLoadsInWebContent</key> <true/> <key>NSExceptionDomains</key> <dict> <key>abc.inc</key> <dict/> </dict> </dict>2) I tried adding the Tomcat and the Tomcat EDCSA certs for both the nodes in the PBX cluster on my test Simulator Iphone and even on the MAC keychain and still not go.3) I tried setting the minimum TLS version to 1.2 and 1.0 just to see if that was an issue.Please let me know in case there is a way to go about troubleshooting this issue? Would it be worth checking the pcaps?