Configure the Active Directory Domain Services (AD CS) certification authority (CA) service (CertSvc) to listen on a static DCOM port

To configure the Active Directory Domain Services (AD CS) certification authority (CA) service (CertSvc) to listen on a static DCOM port

1. Log on with an account that has local administrator permission on the CA
2. Open the Component Services snap-In (dcomcnfg.exe).
3. In the left pane of the Component Services snap-In, expand Component Services, Computers, MyComputer, and then DCOM Config.
4. In the right pane, select CertSrv Request.
5. On the Action menu, click Properties.
6. On the Endpoints tab, click Add.
7. Select Use static endpoint, enter an unused TCP port number, for example, 4000, and then click OKtwice.
8. Close the Component Services snap-In.
9. Restart the certification authority service.
       net stop certsvc 
       net start certsvc