Nextcloud external storage

NethServer Version: 7.9.2009
Module: nextcloud


I have a problem with nextcloud: I’m trying to connect an external archive (a shared folder) to nextcloud but it only works if I give the folder read/write access to guest users in the folder settings.
I’ve already tried entering the domain name (both NETBIOS and full AD) but it still doesn’t work.

Is there anything I can try to do to connect folders without giving guests access?

Thanks in advance