I am creating an Azure AD App that is using the new Yammer delegated permissions preview to post a message to Yammer using the access token that I obtained from Azure AD. Un
From an answer on the Yammer IT Pro Networks group for Office 365 developers, this:
Yammer authorization in apps is still handled completely separate from the rest of Office 365. You need to create a Yammer app in your network, and the users still needs to click the consent dialog to authorize it.
Yes, there is a delegated permission for Yammer API in Azure AD, but unless I am mistaken this does not actually do anything.
This is not from a Yammer source, because they never offer any kind of developer support or up-to-date documentation, but it seems entirely likely that this is another "feature" that simply doesn't work at all.