Here’s a sample PowerShell script/functions to start/stop BizTalk orchestrations.
This is an extended version of the Stop-Orchestration VBScript included in the BizTalk
2006 SDK, which I hope someone finds useful 
.
The script can be used to start or stop either a specific orchestration or a group
of orchestrations defined in a BizTalk assembly. For example, to stop and unenlist
all orchestrations in a given assembly, you could use this:
stop-orch -assembly 'MyProject.BizTalk,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=50b7b2906e3f8aa5' -unenlist
Here’s the code for the script:
$script:bound = 2
$script:started = 4
$script:controlRecvLoc = 2
$script:controlInst = 2
function script:get-assemblyfilter([string]$assembly)
{
# The BizTalk WMI provider uses separate properties
for each
# part of the assembly name, so break it up to
make it easier to handle
$parts = $assembly.Split((',', '='))
$filter = "AssemblyName='$($parts[0])'"
if ( $parts.Count
-gt 1 ) {
for ( $i=1; $i -lt $parts.Count; $i += 2 )
{
$filter = "$filter
and Assembly$($parts[$i].trim())='$($parts[$i+1])'"
}
}
return $filter
}
function script:find-orch([string]$name, [string]$assembly)
{
# We want to be able to find orchestrations by
# name and/or assembly. That way we can control
# all orchestrations in a single assembly in one
call
$filter = ""
if ( ![String]::IsNullOrEmpty($name)
) {
$filter = "Name='$name'"
if ( ![String]::IsNullOrEmpty($assembly)
) {
$filter = "$filter
and $(get-assemblyfilter $assembly)"
}
} else {
$filter = $(get-assemblyfilter $assembly)
}
get-wmiobject MSBTS_Orchestration `
-namespace 'root\MicrosoftBizTalkServer' `
-filter $filter
}
function start-orch([string]$name, [string]$assembly)
{
$orch = (find-orch $name $assembly)
$orch | ?{ $_.OrchestrationStatus
-eq $bound } |
%{
write-host "Enlisting
$($_.Name)..."
[void]$_.Enlist()
}
$orch | ?{ $_.OrchestrationStatus
-ne $started }
| %{
write-host "Starting
$($_.Name)..."
[void]$_.Start($controlRecvLoc, $controlInst)
}
}
function stop-orch([string]$name, [string]$assembly, [switch]$unenlist = $false)
{
$orch = (find-orch $name $assembly)
$orch | ?{ $_.OrchestrationStatus
-eq $started }
| %{
write-host "Stopping
$($_.Name)..."
[void]$_.Stop($controlRecvLoc, $controlInst)
if ( $unenlist )
{
[void]$_.Unenlist()
}
}
}
BizTalkServer 2006, PowerShell