[Samba] Mac OS and interpretation of @ in a username. Ex user at mds.xyz doesn't work on Mac OS but does on Win 10

[Rowland penny]

On 21/02/2020 19:06, torch via samba wrote:
> Am I missing something?  I don’t see where you are using the ‘@‘ symbol anywhere.
> Mac is probably interpreting the parameters “valid users” and “write list" (correctly, I think ;-) as a LIST of 3 users: joe, at, mds.xyz or bob, at, mds.xyz.
>
> torch

My question would be 'why is the OP trying to login using what appears 
to be a UPN to something (standalone server) that doesn't use kerberos ?'

More info required.

Rowland