Thank you for using Office 365. Office 365 subscribers can no longer use Office 2010 with Office 365. To ensure the security of your Office suite and to get all of the latest features, upgrade to Office 2016 for free as part of your Office 365 subscription. See Why you should upgrade to Office 2016 for more details.
Install or upgrade to Office 2016
To install Office 2016, follow the steps in Download and install or reinstall Office 2016 on your PC or Mac.
For Office 365 admins: If you're an Office 365 admin and want to upgrade users in your organization to the latest Office version, see Upgrade users to the latest Office client using Office 365 for business.