This script allows you to gather the latest update for SCOM 2019 and output to a table for an email let you know if there are updates.

Get-SCOM2019CatalogLatestUpdate.ps1

# Author: Blake Drumm (blakedrumm@microsoft.com)
# Date Created: March 27th, 2024
# Website: https://blakedrumm.com/

# Define the HTML content or URL
$url = "https://www.catalog.update.microsoft.com/Search.aspx?q=System+Center+2019+-+Operations+Manager"

try {
    # Get the HTML content of the webpage
    $htmlContent = Invoke-WebRequest -Uri $url
} catch {
    Write-Error "Failed to retrieve the webpage. Error: $_"
    exit
}

# Define regular expression pattern to extract table rows
$tableRowRegex = '<tr[^>]*>(.*?)<\/tr>'

# Find all table rows in the HTML content
$tableRows = [regex]::Matches($htmlContent.Content, $tableRowRegex, [System.Text.RegularExpressions.RegexOptions]::Singleline)

# Define date format for comparison
$dateFormat = "M/d/yyyy"

# Get the current date
$currentDate = Get-Date

# Check if any table rows were found
if ($tableRows.Count -eq 0) {
    Write-Output "No table rows found in the HTML content."
    exit
}

$final = @()
# Iterate through table rows
foreach ($row in $tableRows) {
    $rowHtml = $row.Groups[1].Value

    # Check if the row contains a date
    if ($rowHtml -match '(?:0?[1-9]|1[0-2])\/(?:0?[1-9]|[12][0-9]|3[01])\/(?:20)\d\d') {
        $dateString = $matches[0]
        try {
            $date = [datetime]::ParseExact($dateString, $dateFormat, $null)
            $daysDifference = ($currentDate - $date).Days

            # Check if the date is within the last 30 days
            if ($daysDifference -le 30 -and $daysDifference -ge 0) {
                $final += @"
<tr>
$rowHtml
</tr>
"@
            }
        } catch {
            Write-Warning "Failed to parse date: $dateString. Error: $_"
        }
    }
}
cls
# Email content
$emailFrom = "emailaddress@gmail.com"
$emailTo = "blakedrumm@microsoft.com"
$subject = "System Center 2019 - Operations Manager Updates"
$body = @"
<table border='1'><tr><th></th><th>Update Name</th><th>Products</th><th>Classification</th><th>Last Updated</th><th>Version</th><th>Size</th><th>Download</th></tr>
$final
</table>
<p>For more details, visit the <a href='$url'>Microsoft Update Catalog</a>.</p>
"@
$smtpServer = "smtp.gmail.com"
$smtpPort = 587
$smtpUser = $emailFrom
$smtpPassword = 'yourpasswordhere'

# Send the email
Send-MailMessage -From $emailFrom -To $emailTo -Subject $subject -Body $body -BodyAsHtml -SmtpServer $smtpServer -port $smtpPort -Credential (New-Object System.Management.Automation.PSCredential ($smtpUser, (ConvertTo-SecureString $smtpPassword -AsPlainText -Force))) -UseSsl