If your usage of Yammer is very high, then it may be a better idea to keep on using it. Here are some factors to test this:
How important is the money for you? Yammer is a very expensive experience. While it may offer some upsides, it duplicates a lot of features on Atlassian Confluence and Linchpin1 while not always being the better product.
If you should decide to actually move from Yammer to Microblogging for Confluence here are some suggestions:
This article was originally posted here : https://answers.seibert-media.com/t/can-we-kick-yammer-when-we-adopt-linchpin-intranets-with-microblogging/378/2
View other Case Studies articles.