You need to install the Office 365 desktop setup to configure your desktop applications and install required updates. Before you run Office 365 desktop setup, be sure that your computer meets the. For steps to install the latest version of Office included with your Office 365 for business subscription, such as Office 2016 or Office 2013, see. Important: If you're using Office 2013 or Office 2016, you don't need to perform the steps in this article. You can also learn more about the updates that the desktop setup installs. If some applications have shaded check boxes, they're not available for you to select, perhaps because your admin hasn't set up your account to use them with Office 365. Or your computer may not have the applications installed. Step 2: Connect your desktop version of Outlook to Office 365 After you have run Office 365 desktop setup, connect the desktop version of Outlook that you're already using to Office 365. You can then access your Office 365 or other Exchange-based email using the desktop version of Outlook, like Outlook 2013, Outlook 2010, or Outlook 2007, or by using the web browser version of Outlook, Outlook Web App. To connect your desktop version of Outlook to Office 365, see. If you need to, you can also. Office 365 desktop setup may fail to download future updates if the Automatically Detect Settings option is not selected in your Internet Explorer settings. If you continue to experience problems with updates not downloading, you may need to update your proxy server address. If you stop the installation process before it completes, only some of the required updates may be installed. In this case, we recommend that you run Office 365 desktop setup again to finish installing any remaining updates that are required to connect to and use Office 365. For the desktop setup procedure, see the steps above for using the Desktop Setup Tool. Before Office 365 desktop setup installs the updates that you need, it checks to see if your hard disk has enough space to complete the installation process. If your hard disk does not have enough space, you must free some space before you can continue with the installation process. If you are using Office 365 desktop setup tool for office 2010 and office 2007, you can run the Disk Cleanup tool. Disk Cleanup removes temporary files, empties the Recycle Bin, and removes several system files and other items that you no longer need. You can choose to delete some or all of the files. To run the Disk Cleanup tool, click Start, and then in the Search programs and files box, type cleanmgr, and press Enter. After disk cleanup is completed, start Office 365 desktop setup again. The Windows Installer Service is a required component of Office 365 desktop setup. You must be running the latest version of the service to complete these installations. If you do not have the latest version of the Windows Installer Service, you can download the latest version from the. If you continue to receive an error message, contact your system administrator for assistance. To install these updates, install the Windows Update Agent by going to. When prompted, follow the instructions in the Information bar in Internet Explorer to install the Windows Update ActiveX control. To download and install some updates, Office 365 desktop setup needs to connect to the service. However, in some networks, access to sites and services that are outside of your company's firewall are blocked by the system administrator. If you cannot access the Microsoft Update service, you need to contact your system administrator for assistance. If you do have permissions to install updates from the Microsoft Update service but still receive this error message, check your Internet connection, and then run Office 365 desktop setup again. If you receive a message that says that an administrator is required to install updates for your computer, your user account does not have the necessary permissions to complete the desktop setup. Because the updates must be installed before Office 365 desktop setup can configure your desktop applications, you must contact your system administrator for assistance. After the updates have been installed, you can sign in to your account and run Office 365 desktop setup to configure your desktop applications.
