After enabling the ADS service for Citrix Endpoint Management mostly we would need to try enrolling a device to validate the ADS is enabled. Alternatively, we could verify the same in a different way.

Instructions

1. Browse to the following link: "https://discovery.cem.cloud.us/ads/root/domain/{domain}/ ".
2. Enter the UPN for which we need to verify the ADS and check the output.
3. If Autodiscovery is enabled, we would receive the following output:

{"adminUsers":null,"domainName":"xxx.com","requireCertPinning":false,"plainTextRepresentation":"example.xms.com;443;zdm;true;false;false;false;false;0;8443;1;true;80;;EMAIL;false;false;true;xxx.com","authorizedEmail":null,"appcAGUrl":"","requireTrustedCAAppc":false,"createdBy":null,"displayReenrollLink":true,"domainType":"EMAIL","updatedBy":null,"useSSL":true,"clientCode":"","instanceName":"zdm","portNumber":443,"createDate":1347566400000,"lastUpdate":1491434193000,"notes":null,"promptDelay":0,"useProxy":false,"userOnlyFromExchange":false,"noStrongId":false,"noCELSP":false,"iosEnrollmentPort":8443,"requireTrustedCA":true,"httpPortNumber":80,"pubCerts":null,"id":72,"hostName":"example.xms.com","protocolVersion":1,"status":1}

4. If ADS is not enabled we would receive the following: 

{"plainTextRepresentation":"1020;No record found","showStackTrace":false,"errorMessage":"No record found","stackTrace":null,"errorCode":1020,"cause":null,"message":null,"localizedMessage":null,"suppressed":[]}