The commandline to do this is:
regedit -s DNS_suffix.reg

where DNS_suffix.reg is
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
+]
"SearchList"="yourdom.com new.yourdom.com test.yourdom.com"

[download]
Depending on how many systems - just use a system call.

In reply to Re: OT: Adding DNS Suffix in Windows by tcf03
in thread OT: Adding DNS Suffix in Windows by slloyd

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