- Sign into Office 365 portal.
- Select the App launcher icon in the upper-left and choose “Admin”.
- In the admin center, choose “USERS” and select “Active users”.
- Select the box next to the name of the user whom you want to assign a license.
- Now, license window appears on your screen. Select the check-box – “Microsoft Office 365 Plan E3″.
- If you want to edit more options for license, click on “Edit”.
- Now, you can edit options like “Details”, “Settings” etc.
- Click on “Licenses” to see different licensing options. It will show you number of available licenses. You can also buy new license(s) as per your requirement.