[Samba] Human readable user names vanishing from acls

[Tom Söderlund]

When setting file permissions from MS environment to a file on a Samba4
share, it can be made in clear text with human readable user/group names
and the rights seem to work.

However when checking the permissions again from an MS environment, instead
of human readable user/group names there are plain SID numbers in their
place and there is an icon apparently signifying an unknown SID. How to
keep resolving these into clear text?

Using Samba 4.1.1 and SSSD 1.12.2 with dynamical id mapping (i.e. all user
information resides in the MS AD without Unix attributes) in a RHEL7.1
environment.

Thanks for any info,
-Tom