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Today, Microsoft’s enterprise social network Yammer finally announced the availability of one of the most frequently requested features. You can now edit a text in a post or in an announcement after it has been published. Just like on Facebook, after a post has been edited there will be a tag indicating that it has been edited. Users can also see the edit history by clicking on that tag. This feature is now available on Yammer web and it is coming soon to Yammer apps on iOS and Android.
source:mspoweruser