Yammer functional testing

I have been asked to create a document for our Yammer Functional Testing. I have sort of been dropped in to this at the last minute and without any real Yammer knowledge. I am sure others will have gone through Yammer testing and I wondered if someone would be kind enough to share their testing process. All I am really if after is a list of areas/items/processes that need testing prior to User testing.

Any help/advice will be greatly appreciated,

Kieran