Looks like I may have found my own answer. I can close a "conversation", but cannot delete it. Apparently only an admin can delete a conversation? Sure I can delete what I send, but the conversation still lives on. I am sure this is some legal thing RC is trying to serve. But one would think like IM's on your phone that you could clear old IM's on RC, at least locally.
Looks like it's Skype from now on. At least I can delete entire message chains without getting the IT department involved.
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