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#Change dll path accordingly
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Newtonsoft.Json.dll"
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Octopus.Client.dll"
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Octopus.Platform.dll" 

#Connection data
$apikey = "YOUR-API"
$OctopusURI = "http://YourOctopusURL"
$headers = @{"X-Octopus-ApiKey"="$($apikey)";}

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<#
.Synopsis
   Updates the Step Templates used on Deployment Processes to the latest versions
.DESCRIPTION
   Step templates can be updated from the library on Octopus, but that doesnt mean that the Deployment processes using that template will start using the latest version right away. Normally, the user would have to update the step template on each deployment process manually. This script takes care of that.
.EXAMPLE
   Update-StepTemplatesOnDeploymentProcesses -ActionTemplateID "ActionTemplates-3" -OctopusURI "http://localhost" -APIKey "API-RLMWLZBPMX5DRPLCRNZETFS4HA"
.EXAMPLE
   Update-StepTemplatesOnDeploymentProcesses -AllActionTemplates -OctopusURI "http://Octopusdeploy.MyCompany.com" -APIKey "API-TSET42BPMX5DRPLCRNZETFS4HA"
.LINK

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#make sure this path is correct on your machine
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Newtonsoft.Json.dll"
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Octopus.Client.dll"
Add-Type -Path "C:\Program Files\Octopus Deploy\Tentacle\Octopus.Platform.dll"

$OctopusURI = "" #i.e "Http://Octopus.MyAwesomeCompany.com"
$apikey = "" #i.e "API-7CH6XN0HHOU7DDEEUGKUFUR1K"

$endpoint = new-object Octopus.Client.OctopusServerEndpoint "$($OctopusURI)","$($apikey)"
$repository = new-object Octopus.Client.OctopusRepository $endpoint

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$Try = 0
$MaxRetries = 5
$SecsBeforeRetry = 5
$PSEmailServer = "smtp.company.com"
$from = "Me@company.com"
$to = "You@company.com"
$subject = "Amazing Subject"
$body = "Interesting stuff"

do{

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Add-Type -Path "C:\Tools\Newtonsoft.Json.dll"
Add-Type -Path "C:\Tools\Octopus.Client.dll" #Make sure its version 2.6.x or higher. Otherwhise you'll get errors with the LifecycleId property
Add-Type -Path "C:\Tools\Octopus.Platform.dll"

$OctopusURI = "" #i.e "Http://Octopus.MyAwesomeCompany.com"
$apikey = "" #i.e "API-7CH6XN0HHOU7DDEEUGKUFUR1K"

$endpoint = new-object -TypeName Octopus.Client.OctopusClient(New-Object Octopus.Client.OctopusServerEndpoint($OctopusURI,$apikey))
$repository = new-object Octopus.Client.OctopusRepository $endpoint

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var client = new OctopusClient(new OctopusServerEndpoint(octoUrl, apiKey));
var repo = new OctopusRepository(client);

var project = repo.Projects.FindByName("MyOriginalProject");
            
var newProject = new ProjectResource
{
    Name = "MyClonedProject",
    Description = "Cloned copy",
    ProjectGroupId = project.ProjectGroupId,

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$apiKey = "Your API Key"
$OctopusURL = "Your Octopus URL"

$Header =  @{ "X-Octopus-ApiKey" = $apiKey }

$ProjectName = "Your Project Name"
$EnvironmentName = "Your Environment Name"

#Getting Environment and Project By Name
$Project = Invoke-WebRequest -Uri "$OctopusURL/api/projects/$ProjectName" -Headers $Header| ConvertFrom-Json

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$apiKey = "Your API Key"
$OctopusURL = "Your Octopus URL"

$Header =  @{ "X-Octopus-ApiKey" = $apiKey }

#Release you want to block
$ReleaseID = "Your Release ID" #i.e.  releases-2610

$body = @{description="This is the description for the blocking"} | ConvertTo-Json

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$apiKey = "Your API Key"
$OctopusURL = "Your Octopus URL"

$MaintenanceMode = "True" #Only accepts "True" or "False". Values must be strings

$Header =  @{ "X-Octopus-ApiKey" = $apiKey }

$body = @{IsInMaintenanceMode=$MaintenanceMode} | ConvertTo-Json

Invoke-WebRequest -Uri "$OctopusURL/api/maintenanceconfiguration" -Method PUT -Headers $Header -Body $body

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$OctopusURI = "Your Octopus URI"

$OctopusAPIKey = "Your Octopus APIKey"

$TaskID = "Task ID" #Task ID to cancel asociated with the deployment. e.g "Servertasks-3567"

$Header =  @{ "X-Octopus-ApiKey" = $OctopusAPIKey }

Invoke-WebRequest -Uri "$OctopusURI/api/tasks/$TaskID/cancel" -Method Post -Headers $Header