Virtual Apps 7.15 CU5: VDA is not registering with Delivery Controller.
VDA health assistant tool check will have following error:
Exception 'Object reference not set to an instance of an object.' of type 'System.NullReferenceException'
Following registration event id is logged:
The registration request was rejected by DDC. CdsEventWorkerUnknownRegistrationError is logged in the traces. Reason is “internal error”
DDC CDF trace has following event:
XXXX,X,YYYY-MM-DD hh:mm:ss:xxxxx,xxxxx,xxxxx,x,BrokerComponent,,0,,1,Error,"IRegistrar.Register(S-x-x-xx-xxxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxx): Exception System.DllNotFoundException: Unable to load DLL 'CredentialSecurity.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)