If you want to use single certificate for both umcserver.ssl and sss.ssl certificates.
DCS 6.7 and above
If you are following steps mentioned in KB :
For creating and using third party certificates then to use single certificate, follow the below mentioned steps :
1. SKIP the steps mentioned in section "To generate SSS.SSL keystore"
2. Update connector "SSS-Console-Service" and set path of umcserver.ssl for attribute "keystoreFile" in server.xml file present in tomcat conf directory.
3. Restart DCS Manager server services.