SLES 15 SP4 NFS Mount not working

struggling with a working NFS Mount on SLES15 SP4

User test with id 3200 and gid 200

has to mount a Windows 2016 NFS Server Service under NFS 4
The Windows NFS Share is configured to use AUTH_SYS and a anonymous ID Mapping to 3200/200 and a write access for the client ip.
Unfortunately the clients gets Access denied.

Is there a working config example available for a SUSE SLES15SP4 client accessing a Windows NFS SERVER ?