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It's easy to install updates outside the working time with ADR. We just need to configure a maintenance windows for the device collection with servers. The updates can only be installed during maintenance windows.
How to configure maintenance windows:
https://learn.microsoft.com/en-us/mem/configmgr/core/clients/manage/collections/use-maintenance-windows#configure-maintenance-windows
And you may deploy the ADR with below setting:
If you suppress the system restart, the server will not restart until you restart it manually.
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