SUMMARYCitect Deployment Client Service fails to start : Error 1064 - An exception occurred in the service when handling the control request
SITUATIONCITECT 2018 R2
OS - Windows Server 2016/2019, Windows 10
SYMPTOMWhen configuring Deployment Client in the Configurator, an error occurs as “Deployment Client registration was unsuccessful”, even though the following settings are in place-
- SMS is configured correctly on client machine
- Port 443 is in the exception list and/or firewall is disabled
- User credentials are correct & have been added in the appropriate deployment user group.

During this it can be observed that Citect Deployment Client Service is stopped and on starting manually it throws Error 1064 and fails to start.
ACTIONWhen configuring Deployment Client in the Configurator the username needs to be entered as domainname\username.