Send-Chat-Message to Teams Channel.ps1

$clientID = "your ID"
$User = "your User"
$PW = "your PW"
$resource = "https://graph.microsoft.com"

$TeamName = "Techguy Team"
$ChannelName = "Testing Channel"


#Connect to GRAPH API
$tokenBody = @{  
  Grant_Type = "password"  
  Scope      = "user.read%20openid%20profile%20offline_access"  
  Client_Id  = $clientId  
  username   = $User
  password   = $pw
  resource   = $resource
}   

$tokenResponse = Invoke-RestMethod "https://login.microsoftonline.com/common/oauth2/token" -Method Post -ContentType "application/x-www-form-urlencoded" -Body $tokenBody -ErrorAction STOP
$headers = @{
  "Authorization" = "Bearer $($tokenResponse.access_token)"
  "Content-type"  = "application/json"
}



#Get ID for the Team
$URLgetteamid = "https://graph.microsoft.com/v1.0/groups?$select=id,resourceProvisioningOptions"
$TeamID = ((Invoke-RestMethod -Method GET -Uri $URLgetteamid  -Headers $headers).value | Where-Object -property displayName -value $TeamName -eq).id


#Get ID for the Channel
$URLgetchannelid = "https://graph.microsoft.com/v1.0/teams/$TeamID/channels"
$ChannelID = ((Invoke-RestMethod -Method GET -Uri $URLgetchannelid  -Headers $headers).value | Where-Object -property displayName -value $ChannelName -eq).id



#Send Message in channel
$URLchatmessage = "https://graph.microsoft.com/v1.0/teams/$TeamID/channels/$ChannelID/messages"
$BodyJsonTeam = @"
            
                {
                    "body": {
                      "content": "Hello World"
                    }
                  }
            
"@


Invoke-RestMethod -Method POST -Uri $URLchatmessage -Body $BodyJsonTeam -Headers $headers