how to login Yammer with your Microsoft Account

Set up your Yammer account to start using Yammer to communicate, collaborate, and share information with colleague and coworkers.

1. Go to https://www.office.com

2. Click the "Sign In" button right top corner 

3. Sign in with your email or  Office 365 username and password

after logged in to your micro-soft account you have own dashboard having many Microsoft tools ie Word, Power Point, Excel ,One Drive ,One Note and Yammer .

select Yammer from the dashboard.     

The first thing you should do after logged in to your  account  add your colleagues and coworkers and update your status and share your information and experiences    This will allow others to quickly see your updates , making conversations between coworkers easier