problems with the connection of EP 7.3 with the Exchange 2007 mail server

good morning fellow, I have problems with the connection of ep 7.3 with my Exchange mail server, and can not find information for the EP 7.3, and have been guiding the ep 7.0 but nothing since my problem is reduced to create my object of connection because in ep 7.3 When I do not think it will appreciate the option of choosing a par file, Good for this case "com.sap.netweaver.coll.appl.gw." EAR I deployed in the portal as. EAR but nothing, because when you create the system object in ep7.3 only appears to you to choose a template but nothing that has to do with any file. PAR. EAR, etc as it had in the previous portal, well if someone who knows how to create an object of EP systems in the 7.3, could help .....

christian