Issue : Unable to create New Machine Catalogs or New virtual machines in existing Machine Catalogs. Error : Failed to create virtual machine 'VM##', account name was not found.

Description: Unable to add new machines in existing machine catalogs.
Unable to create new machine catalogs.
Unable to remove AD accounts when trying from DaaS console.

Exception:  ###\###$ : [###\###$, Failed to create the virtual machine; ###\###$, because the account name was not found

MachineFailure: ###\###$
VMStatus : IdentityNotFound
Inner Error: IdentityNotFound

ErrorID : Citrix.MachineCreation.DataModel.MachineCreationDiagnosticException
TaskErrorInformation : Citrix.MachineCreation.DataModel.MachineCreationDiagnosticException: IdentityNotFound

Error Source : CitrixOrchestration

Citrix Cloud feature toggle 'orchaddmachineswithaccountsid' needs to set to 'Enable'. Please contact Citrix technical support.

Problem Cause

Two different forests with the same netbios name.
(Connector) Resource Location: RL1
###.XYZ.local 
Resource Location: RL2
###.XYZ.com 

Issue caused due to internal logic/caching in AD Identity Service of Citrix Cloud. Currently it relies on each forest having a unique NETBIOS name. If there are duplicate entries, calls may get directed towards incorrect forest. 

Normal/ traditional way to represent a computer, is in the format 'Domain NetBIOS name\machine account'. This needs to be changed to format “Full domain name\machine account”.