With Office 365, you can share and grant permission to files with members of your Yammer group without having to leave the product app.

Share files

In an Office app like Word, Excel, or PowerPoint:

  1. From a file you'd like to share, select Share.

  2. Select the permission settings you want.

  3. Type in the name of the Yammer group you want to share with — the name should automatically populate from your organization's directory.

  4. Type a message to give context or information for your file.

  5. Select Send.

Use group resources

Kickstart projects with shared resources in a Yammer group.

Under Office 365 Resources, you'll see different services and apps to help you and your community get started:

  • Manage content and knowledge in a group SharePoint Document Library

  • Build a SharePoint Site for your group

  • Manage notetaking in a shared OneNote

  • Organize tasks for the group in Planner

 
Source: Microsoft