$OUs = Get-ADOrganizationalUnit -Filter * -Properties Description | Select-Object -Property Name, Description, DistinguishedName
$OU = $OUs | Out-GridView -Title 'Please select an OU and click OK' -OutputMode Single
If (-not $OU) {Exit 1}
"You've selected the following OU: '$($OU.DistinguishedName)'" | Write-Host
In the first line, you can of course filter further, for example with the -SearchBase or -Filter argument of Get-ADOrganizationalUnit, or by adding a Where-Clause.