Both \\IP Address and \\computername will display shares but only \\IP Address allows files to be accessed
Windows 10 Pro workstations (the client and the "fileserver") and Windows Server 2019 domain.
Our new domain arrangement is working out well it seems.
Today, I've seen a couple of cases where the User client can't reach a set of fileshares using the serving workstation NAME even though it can get far enough to see the folders.
Using the IP address allows the folders to be opened.
Permissions are fine obviously.
So, name service appears to be working but file access isn't if name service is relied on to finish the job.