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...bal] printcap name=cups winbind enum groups=yes include=/var/tmp/nginx/smb.netbios.aliases.conf admin users=@EXAMPLE\Domain Admins, at EXAMPLE\Enterprise Admins encrypt passwords=yes min protocol=NT1 security=ads local master=no realm=DS.EXAMPLE.COM syno sync dctime=no passdb backend=smbpasswd ldap timeout=60 printing=cups max protocol=SMB3 winbind enum users=yes load printers=yes workgroup=EXAMPLE and in a second file [global] follow symlinks=no create mask= log level=0 wide links=no rpc_server:mdssvc=external...

We have to Samba DCs and a couple of Synology NAS connected/bound to the Samba AD. On regular basis the Synology NAS (I believe Samba 4.4.16) looses its connection to the AD outputting the error message, that the domain cannot be found. In the logs of the NAS I can only find the error message ?synowin: domain_test_join.c:59 net ads test join fail?. In the logs of the DC I notice that from one