Zero-Downtime Multi-Cloud Migration Strategy for GCC Enterprise Workloads

# Microsoft Entra ID & Hybrid Infrastructure Pre-Flight Audit
# Verifies PTA Status, MFA Enforcement, and Subnet Replication Status

Write-Host "Starting GCC Enterprise Pre-Flight Telemetry Check..." -ForegroundColor Cyan

# 1. Verify Active Directory Sync Status
$ADSyncStatus = Get-MgDirectoryOnPremiseSynchronization
if ($ADSyncStatus.SyncStatus -eq "Enabled") {
    Write-Host "[SUCCESS] Hybrid Identity Sync Active" -ForegroundColor Green
} else {
    Write-Host "[WARNING] Hybrid Identity Sync Inactive or Impaired" -ForegroundColor Red
}

# 2. Audit Privileged MFA Policy
$MFAEnforced = Get-MgIdentityConditionalAccessPolicy | Where-Object {$_.DisplayName -like "*Privileged MFA*"}
if ($MFAEnforced.State -eq "enabled") {
    Write-Host "[SUCCESS] FIDO2 / Phishing-Resistant MFA Enforced" -ForegroundColor Green
} else {
    Write-Host "[CRITICAL] Privileged Accounts Lack Enforced Hardware MFA" -ForegroundColor Yellow
}

# 3. Check Dedicated Cloud Circuit Latency
$PingResult = Test-NetConnection -ComputerName "10.100.0.1" -Port 443
if ($PingResult.PingReplyDetails.RoundtripTime -lt 10) {
    Write-Host "[SUCCESS] Cloud Hybrid Circuit Latency Optimal (< 10ms)" -ForegroundColor Green
} else {
    Write-Host "[WARNING] High Latency Detected on Hybrid Bridge" -ForegroundColor Yellow
}