Looking for logging into the Yammer Button site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Yammer Button site. After that you can login as usual with your login credentials.
https://developer.yammer.com/docs/authentication
https://developer.yammer.com/docs/single-sign-on
https://developer.yammer.com/docs/js-sdk
https://techcommunity.microsoft.com/t5/SharePoint-Developer/Embedded-Yammer-feed-showing-Yammer-Login-button-in-IE11/td-p/34892
https://answers.microsoft.com/en-us/msoffice/forum/all/yammer-login-with-a-generic-account/6c36be7b-c8af-4d87-9639-0fccd54ec545
https://docs.microsoft.com/en-us/yammer/manage-yammer-users/office-365-sign-in
https://books.google.dk/books?id=yZCKCgAAQBAJ&pg=PA236&lpg=PA236&dq=yammer+login+button
https://products.office.com/en-us/yammer/yammer-collaboration-platform
https://newsignature.com/articles/yammer-single-sign-on-not-what-you-would-expect/
https://stackoverflow.com/questions/39566720/yammer-login-sso-without-embedfeed
https://github.com/yammer/JS_SDK_Sample/blob/master/activity.html