Enable / Disable External Forwarding on a Domain (Windows PS)
Options:
a) Set-DomainForwarding -Domain domain.com -Enabled $true
b) Enable-DomainForwarding -Domain domain.com
c) Set-DomainForwarding -Domain domain.com -AllowExternal $true
d) Set-DomainForwarding -Domain domain.com -ExternalForwarding $true
