Can we used 'HTTPS' when creating SETSPN for creating the SPN for AD SSO on Tomcat for SAP BI 4.3?

Dear All,

Currently implementing AD SSO on Tomcat with SAP BI 4.3 SP1 and my manual AD works fine. However my SSO fails [being prompted for logon screen] with below message in stdout.log

com.wedgetail.idm.sso.ConfigException: All SPNs failed verification.
com.businessobjects.webpath.rebean3ws.Activator

setspn -s HTTPS/BISERVERNAME SERVICEACCOUNT

setspn -s HTTPS/BISERVERNAME.FQDN SERVICEACCOUNT

Can anyone advise whether HTTPS is supported or should we used HTTP for creating the Tomcat SPN's?

Many thanks in advance.

Best Regards

Sheik