I need to download, export or somehow save the last few years of our group Yammer account for my company. We are switching to a new domain, and don't want to lose all the discussions and files. Any ideas?
When you change domains it is possible to merge Yammer networks. This allows the old network to exist as an external network you can access. Merges must be requested through a support ticket to Microsoft.
The alternative is to use the Data Export feature to get a ZIP file of all messages in CSV format and files posted.