There are multiple ways do accomplish the same end on LinkedIn. In this case, a client emailed asking how to find an old message he sent.
Well, here’s one way. Tomorrow, another way.
Look up that person by name on LinkedIn. Open their profile page and assuming you are on a first level connection basis with him or her, look below the person’s contact details for an icon and material under it that looks like this:
It will show the date and LinkedIn messages you traded.
That assumes you are looking for a particular person’s message. Tomorrow, how to find all messages chronologically.