Problem:
In Bug 47314 we fixed the problem, that cross-domain samba share access via same user+password doesn’t work any more on UCS memberservers which are joined into a UCS Samba/AD domain. (You may know the “map untrusted to domain” option.)
Now after an update this makes trouble again.
This may happened as an unique domain-specific error that the “auth methods” set via ucr Variable are not used or applied after the update.
Solution:
On the Samba domaincontroller you have to reset the ucr Variable:
ucr set samba/global/options/"auth methods"="sam winbind sam_ignoredomain"
and restart the samba service via:
/etc/init.d/samba restart