With more and more companies using private business instant messaging clients, it’s easy to have more conversations through the IM client. The problem is that not all conversations should be had through these chat apps. So here are a few situations where office LAN messaging like this app at Linkedin.com may not be the right tool. Documentation Ever had someone commit to a deadline and you were so glad you had that email to hold them to it? Imagine if you had that conversation on your IM client and you had no way to prove the commitment. The fact is that within a company there are many mini-contracts made. If…