Add Yammer to the navigation bar for SharePoint 2013
Applies to: SharePoint Server 2013, Yammer Enterprise
Topic Last Modified: 2014-02-14
Summary: Use a toggle switch to determine whether to show the SharePoint Newsfeed link or Yammer on the top navigation bar in SharePoint 2013 with Service Pack 1 (SP1).
When you are running Service Pack 1 for SharePoint Server 2013, you can choose whether to show the SharePoint Newsfeed link or Yammer on the top navigation bar with a simple toggle switch. If you want to use Yammer, you select Activate Yammer in Central Administration. This replaces the Newsfeed link on the top navigation bar with a link to Yammer.To add Yammer to SharePoint on-premises navigation
Verify that the user account that is performing this procedure is a member of the Farm Administrators group.
On the Central Administration website, choose Office 365 > Configure Yammer.
On the Yammer Configuration page, select Activate Yammer.