Inbox sync has been giving this error, which I assume is related to a specific message in the inbox:

X:\Portal\Client\CEOutlookTranslator\Pfolder.cpp 655
Error occurred while getting Inbox records, records Processed = 0
COM Error 80004005
X:\Portal\Client\CEOutlookTranslator\Pfolder.cpp 2972
Error occurred while getting captured Inbox changes, changes Processed = 0
COM Error 80004005

Is there any log file to look at that will point to the problem message(s)?