It's freezing up at the following. $connUri is a mail servers FQDN.
Write-Log "Connecting to Exchange: $connUri"
$sessionOpt = New-PSSessionOption -OpenTimeout 30000 -OperationTimeout 60000
$session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri $connUri -Authentication Kerberos -SessionOption $sessionOpt -ErrorAction Stop
We have two servers running 3.16.21906 in separate AD sites.