Updating existing Office installations
After Office is installed, you apply software updates directly to the client computer without returning to the network installation point. You do this through a deployment management program such as Microsoft Systems Management Server or System Center 2012 Configuration Manager, by using Windows Server Update Services, or by updating computers directly from the Internet by using Microsoft Update.
Note:
After Office is installed on a client computer, a reinstallation of Office reapplies only those software updates that were applied during the original installation. If you copied new software updates in the Updates folder, they will not be applied during the reinstallation.
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