Prueba esto
SELECT MIN(I.INCIDENTID) AS "Incident ID",
I.CREATIONDATE AS "Creation Date",
MO.IPADDRESS AS "IP Address",
MO.DOMAINUSERNAME AS "Login ID",
MO.ENDPOINTMACHINENAME AS "Computer Name",
M.MESSAGESUBJECT AS "Email Subject"
FROM MESSAGE M,
INCIDENT I,
MESSAGEORIGINATOR MO
WHERE M.MESSAGESOURCE = 'ENDPOINT'
AND M.MESSAGESOURCE = I.MESSAGESOURCE
AND M.MESSAGEID = I.MESSAGEID
AND M.MESSAGEDATE = I.MESSAGEDATE
AND M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID
AND I.ISDELETED = 0
GROUP BY I.CREATIONDATE, MO.IPADDRESS, MO.DOMAINUSERNAME, MO.ENDPOINTMACHINENAME,M.MESSAGESUBJECT
