Error when adding a new derived SBC for Direct Routing: Cannot find specified Gateway


When adding a new derived Session Border Controller (SBC) for Direct Routing using New-CSOnlineVoiceRoute cmdlet, you receive this error message:

"Cannot find specified Gateway"


New domains must have at least one user enabled for Enterprise Voice to create a voice route for a derived SBC.


Enable at least one user for Enterprise Voice in the newly verified domain. See the detailed steps here.