One Identity not showing new host in managed host data governance

Hi everyone, 

I have some problems with my One Identity Data Governance Edition 8.1.5.

I can't see in "Managed Host" any host except for my local windows computer. 

I've also made the  modification of the Data Governance service config file, adding:

<customHostParameters>

    <additionalOperatingSystems>

        <operatingSystem value="Windows Server 2016 datacenter"/>

    </additionalOperatingSystems>

</customHostParameters>

Any suggestion to fix the problem?

Thank you all in advance!

Miriam