Checkmk parameters

Hi Martin,
As suggested I passed SERVICEDISPLAYNAME variable in subject and its returning in empty value. I have placed the rule in the specifice service with Service alternative display name. Not sure what am missing here.
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Is there any possibility to change this default Service_desc “Check_mk” to original windows service name “CheckmkService” . Please advise on this as I am trying to get the exact service name in html mail notification.
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