The underscore character _ cannot be used in Network Address fields throughout SPP.
For example, if the FQDN of a server is test_server01.test.local and this is entered into the Network Address field when configuring an asset, it will not allow the configuration to continue.
The error message states, "You must specify a valid hostname or IP address for the network."
Use the IP address of the server/computer or change the FQDN or hostname to not include an underscore character.
Enhancement request 231478 has been submitted to Development for consideration in a future release of One Identity Safeguard for Privileged Passwords.