Check for Office for Mac updates automatically
Turn on AutoUpdate so your copy of Office will always be up-to-date. You can set AutoUpdate to check for updates each day, week, or month.
Open any Office application such as Word, Excel, PowerPoint, or Outlook.
On the Help menu, select Check for Updates.
Important If you don't see Check for Updates on the Help menu, download the latest version of the Microsoft AutoUpdate tool from https://support.microsoft.com/en-us/kb/3133674. Run the tool and then start over at step 1. The Check for Updates option now appears on the Help menu.
Under How would you like to check for software updates? select Automatically.
(If you want to manually check for updates or you don't want AutoUpdate to appear automatically when new updates are available, under How would you like to check for software updates?, select Manually.)
On the Check for updates pop-up menu, select the frequency that you want AutoUpdate to use to check for new updates.
Click Check for Updates.
If an update is available for your version of Office, you will see a link to a website with more information about the update.