An ordinary domain user can join 10 members to the domain by default.

Using ADFind.exe freeware and ADMod.exe freeware, I have scripted MachineAccountQuota.bat to alter the default.

The syntax for using MachineAccountQuota.bat is:

call MachineAccountQuota Number

Where Number is the new limit for the DNS domain you are logged onto.

NOTE: MachineAccountQuota.bat uses Numeric.bat, MachineAccountQuota.bat contains:

@echo off
setlocal
if \{%1\}==\{\}  goto err
set work=%1
set work=%work:"=%
call Numeric %work% OK
if "%OK%" EQU "N" goto err
if "%work%" EQU "0" goto OK
if "%work:~0,1%" EQU "0" goto err
set /a Number=%work%
call :getDomainDNS>nul 2>&1
if "%dn%" EQU "NONE" goto err
call :putDomainDNS>nul 2>&1
endlocal
goto :EOF
:getDomainDNS
set dn=NONE
<font size="1">for /f "Tokens=1* Delims=:" %%a in ('adfind -default -f "objectClass=DomainDNS" -nodn -noctl distinguishedName^|find /i "distinguishedName"') do (</font>
 set dn=%%b
)
if "%dn%" EQU "NONE" goto :EOF
set dn=%dn:~1%
goto :EOF
:putDomainDNS
admod -b %dn% "ms-DS-MachineAccountQuota::%Number%"
goto :EOF
:err
@echo Syntax: MachineAccountQuota Number
endlocal