Allow Server Operators to use AT command


Hive: HKEY_LOCAL_MACHINE
Key:
SYSTEM\CurrentControlSet\Control\Lsa
Name:
SubmitControl
Type: REG_DWORD
Value: 1

On a Domain Controller, the server operator accounts must be added to the
Server Operators group. On a member server or a stand-alone server, they must be
added to the local Administrators group. There is no way to allow anyone not in
such powerful groups to issue AT commands. Scheduled tasks are run in the
security context of the Schedule service which often is allowed to execute as
SYSTEM. Adding users to such powerful groups is NOT recommended. Third-party
products are better approach if they do not also run as operating system
powerful account.

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