Quick script to update a tm profile, enabling or disabling an endpoint. The script will ensure you never disable all endpoints.

Update-TrafficManagerProfile.ps1

#
# Update_TrafficManagerProfile.ps1
#
# Example Usage: .\Update-TrafficManagerProfile.ps1 -TMResourceName "lawrence-scratch-www" -ResourceGroup "lawrence-scratch" -ProfileName "example1" -DisableEndpoint

Param(
	[string][Parameter(Mandatory=$true)] $TMResourceName,
	[string][Parameter(Mandatory=$true)] $ResourceGroup,
	[string][Parameter(Mandatory=$true)] $ProfileName,
	[switch][parameter(ParameterSetName="enableSet")]$EnableEndpoint,
	[switch][parameter(ParameterSetName="disableSet")]$DisableEndpoint
)
$ErrorActionPreference = "Stop";

Write-Host ""
Write-Host "Fetching Endpoints on: $TMResourceName"
Write-Host "***************************************"


$profile = Get-AzureRmTrafficManagerProfile –Name $TMResourceName -ResourceGroupName $ResourceGroup

Write-Host "$($profile.Endpoints.Count) endpoints found."

$profile.Endpoints | %{Write-host "-- $($_.Name)"}

Write-Host ""
Write-Host "Updating Endpoint: $ProfileName"
Write-Host "***************************************"


#Get the endpoint we want
$endpointToDisable = $profile.Endpoints | ?{ $_.Name -eq $ProfileName } | select -first 1

if ($EnableEndpoint)
{
	Write-Host "--Enabling Endpoint: $ProfileName"
	$endpointToDisable.EndpointStatus = "Enabled"
}

if ($DisableEndpoint)
{
	

	Write-Host "--Disabling Endpoint: $ProfileName"
	$endpointToDisable.EndpointStatus = "Disabled"
}

$enabledEndpoints = $profile.Endpoints | ?{ $_.EndpointStatus -eq "Enabled" } | Measure
if ($enabledEndpoints.Count -lt 1)
{
	throw "Disabling this endpoint would leave not endpoints enabled and result in an outage!! Aborting!!"
}

#Save the config back to azure 
$updatedProfile = Set-AzureRmTrafficManagerProfile –TrafficManagerProfile $profile  

Write-Host ""
Write-Host "Update Completed"
Write-Host "***************************************"

$updatedProfile.Endpoints