This is not the case for me. Am not using SSL and am still not able to see free/busy data.
Downloaded Free/Busy the file looks fine.
Read URLin the registry key: http://server/service/pubcal/freebusy.ifb?acct=%name%@%server% <--- replace actual hostname here with server not to expose host.
value for SMTP in the registry key: {DCEDFCBF-C7D1-4B81-A20F-7524D306135E} |