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Description of problem:
smbclient against member => WORKS
on member: wbinfo --change-secret
smbclient against member => INVALID_PARAMETER

We need:

https://git.samba.org/?p=samba.git;a=commitdiff;h=751b1520a1e6959e901c02dc3daaa7d727ae3d1f

This is a regression introduced with the security update to address badlock and the CVEs around it.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0662.html