I think you’ll need to be using the paid version of Yammer to do that. Best to ask the Yammer people directly, as I’m sure it’s something they’ve dealt with already.
Mark
]]>It doesn’t look like Yammer provide an import facility, but there is a third-party tool that does it. I’ve not tested it though.
Reading the Yammer FAQs, it says:
]]>“Once you’ve upgraded your Yammer network to one of our premium packages, your company’s Yammer messages can be exported into a standard format (.eml). This allows you to use your existing data-mining tools for e-discovery. Yammer can also provide you with periodic backups of all your Yammer data so you can keep a local copy. Under the Electronic Communications Privacy Act, Yammer cannot be compelled to turn over your content from your Yammer network to any third-party, except for government entities.”