A Java KeyStore (JKS) is a repository of security certificates.
After successfully changing the password, you can use the Java keytool (Agent\bin\jre\bin\keytool.exe) to change or sign the Spotlight Diagnostic Server certificate, which is stored in the "sosse" key alias.
To set the KeyStore password:
Verify that Alarm Actions and Planned Outages are working as expected.
Verify that a keystore password entry can be found in the Spotlight Diagnostic Server install folder conf\Service\WebServic.xml
For more information, see http://docs.oracle.com/javase/8/docs/technotes/tools/windows/keytool.html.