Query ObjectId of ConditionalAccessLocationCondition - azure

Question

I am writing a script to write to Azure, I basically want to find a user, create a network location, create a conditional access policy. This is what I have so far. The trouble is that the $secmon_guid and $location_policy_guid do not work. If I manually put the values in, it works.
# Run these commands first to connect and install without the #
Install-Module -Name AzureAD -AllowClobber -Force # Answer Y to install NuGet. Run once on workstation running script.
Install-Module -Name Microsoft.Graph.Identity.SignIns -Force # Install this to allow us to setup a trusted location. Run once on workstation running script.
Install-Module MSOnline -Force #Allow us to edit users. Run once on workstation running script.
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine #Set execution policy to allow our script to do things.
Import-Module -Name AzureAD #The following 3 commands are ran for each client.
Connect-AzureAD # Use GA credentials from Glue
Connect-MsolService #Reauthenticate if necessary.
Get-AzureADMSConditionalAccessPolicy #This will list out all of the existing CA policies. This is a good opportunity to get them into documentation.
Connect-MgGraph #This enabled graph, you will need to approve the request in the popup window.
#Set variable for account name
Set-Variable -name "account" -Value "secmon"
#Create named location for the IP address
$ipRanges = New-Object -TypeName Microsoft.Open.MSGraph.Model.IpRange
$ipRanges.cidrAddress = "IP ADDR"
New-AzureADMSNamedLocationPolicy -OdataType "#microsoft.graph.ipNamedLocation" -DisplayName "Blackpoint IP Address for SecMon" -IsTrusted $true -IpRanges $ipRanges
#Disable MFA for secmon
Get-MsolUser -SearchString "secmon" | Set-MsolUser -StrongAuthenticationRequirements #()
#Get the Azure AD GUID for use later
$secmon_guid = Get-MsolUser -SearchString "secmon" | Select ObjectID
#Name the policy
$name = "Allow Secmon Only from Blackpoint IP"
#Enable the policy. Set to Disabled to test.
$state = "Enabled"
#Get location GUID and save to variable
$location_policy_guid = Get-AzureADMSNamedLocationPolicy | Where-Object -Property DisplayName -Contains 'Blackpoint IP Address for SecMon' | Select-Object -Property Id
#Working on this
#Create the overarching condition set for CA, this is the container.
$conditions = New-Object -TypeName Microsoft.Open.MSGraph.Model.ConditionalAccessConditionSet
#Include all applications - This might be able to be removed?
$conditions.Applications = New-Object -TypeName Microsoft.Open.MSGraph.Model.ConditionalAccessApplicationCondition
$conditions.Applications.IncludeApplications = 'All'
#Create the user condition and include secmon
$conditions.Users = New-Object -TypeName Microsoft.Open.MSGraph.Model.ConditionalAccessUserCondition
$conditions.Users.IncludeUsers = $secmon_guid
#Add new location policy to CA policy
$conditions.Locations = New-Object -TypeName Microsoft.Open.MSGraph.Model.ConditionalAccessLocationCondition
$conditions.Locations.IncludeLocations = $location_policy_guid
#Grant access control to CA policy
$controls = New-Object -TypeName Microsoft.Open.MSGraph.Model.ConditionalAccessGrantControls
$controls._Operator = "OR"
$controls.BuiltInControls = "block"
#End work
New-AzureADMSConditionalAccessPolicy `
-DisplayName $name `
-State $state `
-Conditions $conditions `
-GrantControls $controls
The error I get is due to poorly formatted GUID's, the values I am pulling are not correct. How can I fix this? Any help is greatly appreciated!
New-AzureADMSConditionalAccessPolicy : Error occurred while executing NewAzureADMSConditionalAccessPolicy
Code: BadRequest
Message: 1054: Invalid location value: #{Id=1234GUID}.
InnerError:
RequestId: 5678GUID

Answer 1

Where you define the variables, you need to use -ExpandProperty on the select-object statement e.g:
$secmon_guid = Get-MsolUser -SearchString "secmon" | Select -ExpandProperty ObjectID
Otherwise, you would have to access your current variable like so:
$conditions.Users.IncludeUsers = $secmon_guid.ObjectID