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@ -34,27 +34,62 @@ To use Windows Update for Business, Windows 10-based devices must first be conf
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Windows Update for Business allows administrators to control when upgrades and updates are deployed to their Windows 10 clients by specifying deferral windows from when they are initially made available on the Windows Update service. As mentioned, there are restrictions as to how long you can delay upgrades and updates. The following table details these restrictions, per deployment category type:
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**Group Policy keys**
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<table>
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<tr>
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<td rowspan="2">
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<p><b>Group Policy keys</b></p>
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</td>
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<td>
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<p>HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\DeferUpgradePeriod</p>
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<ul>
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<li>
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<p>Values: 0-8 where each unit for upgrade is a month
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HKEY\_LOCAL\_MACHINE\\Software\\Policies\\Microsoft\\Windows\\WindowsUpdate\\DeferUpgradePeriod
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- Values: 0-8 where each unit for upgrade is a month
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HKEY\_LOCAL\_MACHINE\\Software\\Policies\\Microsoft\\Windows\\WindowsUpdate\\DeferUpdatePeriod
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- Values: 0-4 where each unit for update is a week
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**MDM**
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*./Vendor/MSFT/Update/DeferUpgrade*
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Software\\Microsoft\\PolicyManager\\current\\Update\\RequireDeferUpgrade
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- Values: 0-8 where each unit for upgrade is a month
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Software\\Microsoft\\PolicyManager\\current\\Update\\RequireDeferUpdate
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- Values: 0-4 where each unit for update is a week
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</p>
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</li>
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</ul>
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</td>
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</tr>
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<tr>
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<td>
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<p>HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\DeferUpdatePeriod</p>
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<ul>
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<li>
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<p>Values: 0-4 where each unit for update is a week
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</p>
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</li>
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</ul>
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</td>
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</tr>
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<tr>
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<td rowspan="2">
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<p><b>MDM</b></p>
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<p><i>./Vendor/MSFT/Update/DeferUpgrade</i></p>
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</td>
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<td>
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<p>Software\Microsoft\PolicyManager\current\Update\RequireDeferUpgrade
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</p>
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<ul>
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<li>
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<p>Values: 0-8 where each unit for upgrade is a month
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</p>
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</li>
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</ul>
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</td>
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</tr>
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<tr>
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<td>
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<p>Software\Microsoft\PolicyManager\current\Update\RequireDeferUpdate</p>
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<ul>
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<li>
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<p>Values: 0-4 where each unit for update is a week
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</p>
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</li>
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</ul>
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</td>
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</tr>
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</table>
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@ -65,31 +65,44 @@ In Windows 10, Windows Update for Business recognizes three deployment categori
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Both upgrades and updates can be deferred from deployment to client machines by a Windows Update for Business administrator within a bounded rage of time from when those updates are first made available on the Windows Update service. This deferral capability allows administrators to validate deployments as they are pushed to all their Windows Update for Business enrolled clients. The following table defines maximum deferral periods allowed by deployment type:
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Category
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Maximum deferral
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Deferral increments
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Classification type
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Classification GUID
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OS upgrades
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8 months
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1 month
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Upgrade
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3689BDC8-B205-4AF4-8D4A-A63924C5E9D5
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OS updates
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4 weeks
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1 week
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Security updates
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0FA1201D-4330-4FA8-8AE9-B877473B6441
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Drivers
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EBFC1FC5-71A4-4F7B-9ACA-3B9A503104A0
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Updates
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CD5FFD1E-E932-4E3A-BF74-18BF0B1BBD83
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Other/non-deferrable
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No deferral
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No deferral
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Definition updates
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E0789628-CE08-4437-BE74-2495B842F43B
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<table>
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<tr>
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<th>Category</th>
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<th>Maximum deferral</th>
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<th>Deferral increments</th>
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<th>Classification type</th>
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<th>Classification GUID</th>
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</tr>
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<tr>
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<td>OS upgrades</td>
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<td>8 months</td>
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<td>1 month</td>
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<td>Upgrade</td>
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<td>3689BDC8-B205-4AF4-8D4A-A63924C5E9D5</td>
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</tr>
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<tr>
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<td rowspan="3">OS updates</td>
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<td rowspan="3">4 weeks</td>
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<td rowspan="3">1 week</td>
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<td>Security updates</td>
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<td>0FA1201D-4330-4FA8-8AE9-B877473B6441</td>
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</tr>
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<tr>
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<td>Drivers</td>
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<td>EBFC1FC5-71A4-4F7B-9ACA-3B9A503104A0</td>
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</tr>
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<tr>
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<td>Updates</td>
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<td>CD5FFD1E-E932-4E3A-BF74-18BF0B1BBD83</td>
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</tr>
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<tr>
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<td>Other/non-deferrable</td>
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<td>No deferral</td>
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<td>No deferral</td>
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<td>Definition updates</td>
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<td>E0789628-CE08-4437-BE74-2495B842F43B</td>
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</tr>
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</table>
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## Related topics
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