Send SMS/Text Message via Twillo

Send-TextNotification.ps1

function Send-TextNotification {
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $true)]
        $to,
        [Parameter(Mandatory = $true)]
        $from,
        [Parameter(Mandatory = $true)]
        $accountSID,
        [Parameter(Mandatory = $true)]
        $auth,
        [Parameter(Mandatory = $true)]
        $msg
    )
    
    try {
        # Send Message
        $body = @{Body = $msg; To = $to; From = $from;}
        $result = Invoke-RestMethod -Method Post -Uri "https://api.twilio.com/2010-04-01/Accounts/$($accountSID)/Messages.json" -Body $body -Credential $auth -UseBasicParsing
        if ($result.sid) {
            Write-host -ForegroundColor green "Message to: $($result.to) is $($result.status)"
        }

    } catch {
        Write-Error "Failed to send Notification. ErrorCode: $($_.Exception.Response.StatusCode.value__) ErrorDetails: $($_.Exception.Response.StatusDetails) ErrorDescription: $($_.Exception.Response.StatusDescription)"
    }    
}

# TLS 1.2
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
# Twillo Account SID
$accountSID = "yourTwilloAccountSID"
# Twillo Account Token
$accountToken = "yourTwilloAccountToken"
# Basic Auth
$p = $accountToken | ConvertTo-SecureString -asPlainText -Force
$auth = New-Object System.Management.Automation.PSCredential($accountSID, $p)

# To
[string]$to = '+DestinationMobileNumber'
# From
[string]$from = '+TwilloAccountMobileNumber'
# Message
[string]$msg = "Everything is on fire. Investigate and Remediate immediately!!"

Send-TextNotification -from $from -to $to -auth $auth -msg $msg -accountSID $accountSID