Comment 2 for bug 1954342

Same here, my configuration is more or less similar to the OP's. After the update, the domain users authenticate successfully on their Windows client machines against the Samba DC, so both LDAP and authentication seem to work (I also use the same LDAP records for authentication of other software, so that definitely works). Once authenticated, when they try to access a Samba server (which is a member of the domain), they are asked for their credentials (which obviously don't work, otherwise they wouldn't be asked, 'cause they're domain credentials).