By default, WSUS is set for manual synchronization, which means you must click the Synchronize now button every time you want WSUS to synchronize. This works fine for your initial synchronization, but you should automate it for future synchronizing. One of the main reasons for deploying WSUS is to automate client updates. Leaving your WSUS server in a state where synchronizations are manual does not help automation.
You can schedule WSUS for daily updates at any half-hour increment from the Synchronization Options page shown in Figure 6.3. Select the radio button next to Synchronize daily at and choose the time you want WSUS to synchronize. Remember, WSUS does not necessarily start the download at the time specified. It uses a random 30-minute offset, meaning it will start somewhere between the time you specified and up to 30 minutes later. Microsoft does this so that those who set their WSUS server to download at a given time (e.g., 3:30 A.M.) do not start downloading at exactly the same time.The random offset spreads the load between 3:30 A.M. and 4:00 A.M.
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