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$tenantId = 'xxxxxxxxxxx'
$ClientID = 'xxxxxxxxxxx'
$ClientSecret = 'xxxxxxxxxxx'
$users = "TestUser1@alexholmeset.onmicrosoft.com","TestUser2@alexholmeset.onmicrosoft.com"
#Number of hours the presence should be valid.
$Hours = "8"
function Get-MSGraphAppToken{
<# .SYNOPSIS
Get an app based authentication token required for interacting with Microsoft Graph API
.PARAMETER TenantID
A tenant ID should be provided.
.PARAMETER ClientID
Application ID for an Azure AD application. Uses by default the Microsoft Intune PowerShell application ID.
.PARAMETER ClientSecret
Web application client secret.
.EXAMPLE
# Manually specify username and password to acquire an authentication token:
Get-MSGraphAppToken -TenantID $TenantID -ClientID $ClientID -ClientSecert = $ClientSecret
.NOTES
Author: Jan Ketil Skanke
Contact: @JankeSkanke
Created: 2020-15-03
Updated: 2020-15-03
Version history:
1.0.0 – (2020-03-15) Function created
#>
[CmdletBinding()]
param (
[parameter(Mandatory = $true, HelpMessage = "Your Azure AD Directory ID should be provided")]
[ValidateNotNullOrEmpty()]
[string]$TenantID,
[parameter(Mandatory = $true, HelpMessage = "Application ID for an Azure AD application")]
[ValidateNotNullOrEmpty()]
[string]$ClientID,
[parameter(Mandatory = $true, HelpMessage = "Azure AD Application Client Secret.")]
[ValidateNotNullOrEmpty()]
[string]$ClientSecret
)
Process {
$ErrorActionPreference = "Stop"
# Construct URI
$uri = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"
# Construct Body
$body = @{
client_id = $clientId
scope = "https://graph.microsoft.com/.default"
client_secret = $clientSecret
grant_type = "client_credentials"
}
try {
$MyTokenRequest = Invoke-WebRequest –Method Post –Uri $uri –ContentType "application/x-www-form-urlencoded" –Body $body –UseBasicParsing
$MyToken =($MyTokenRequest.Content | ConvertFrom-Json).access_token
If(!$MyToken){
Write-Warning "Failed to get Graph API access token!"
Exit 1
}
$MyHeader = @{"Authorization" = "Bearer $MyToken" }
}
catch [System.Exception] {
Write-Warning "Failed to get Access Token, Error message: $($_.Exception.Message)"; break
}
return $MyHeader
}
}
$global:Header = Get-MSGraphAppToken –TenantID $tenantId –ClientID $ClientID –ClientSecret $ClientSecret
foreach($user in $users){
$uri = "https://graph.microsoft.com/v1.0/users/$user"
$UserID = (Invoke-RestMethod –Uri $uri –Method GET –Headers $global:Header -ContentType "application/json").id
$body = @"
{
"availability": "DoNotDisturb",
"activity": "DoNotDisturb",
"expirationDuration": "PT$($Hours)H"
}
"@
$uri = "https://graph.microsoft.com/beta/users/$userid/presence/setUserPreferredPresence"
Invoke-RestMethod –Uri $uri –Method Post –Body $body –Headers $global:Header -ContentType "application/json"
}
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