I understand that 2019 is ‘supported’ and listed here; LINK, however Webroot does not seem to disable or put Windows Defender in to passive mode on Server 2019 like it would for Windows 10. It also does not show as a listed Security provider in Settings-->Windows Security-->Open Windows Security-->Virus & Threat protection-->Manage providers (link on the right). This leaves the Windows Defender Antivirus Service set to Automatic and running. We all know that less is more when it comes to the amount of antivirus agents on a single machine.
I have been unable to find any documentation on your site or in the community regarding 2019 best practices or when it will be fully compatible. Please advise.