try {
    # Import admin credentials
    $serverAddress = Get-Content -Path ".\DefaultServer.txt"
    $credential = Import-Clixml -Path .\AdminCredential.xml

    # Establish session with Exchange Server
    $session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://$serverAddress/PowerShell/ -Authentication Kerberos -Credential $credential
    Import-PSSession $session -DisableNameChecking

    # Update the Offline Address Book
    $offlineAddressBooks = Get-OfflineAddressBook
    foreach ($oab in $offlineAddressBooks) {
        Write-Host `nUpdating Offline Address Book: $($oab.Name) -ForegroundColor Magenta
        Update-OfflineAddressBook -Identity $oab.Identity
    }

    Write-Host `nOffline Address Book update completed successfully. -ForegroundColor Green

    Remove-PSSession $session
} catch {
    Write-Host `nFailed to update Offline Address Book. Error: -ForegroundColor Red
    Write-Host $_
}