WebDAV and 2 users

I need to access a directory via webdav from several users.
I created a pool /share.
The pool owner is webdav:webdav.
I created the user user1 in the webdav group.
Access rights to /share rwxrwx—
I connect to http://ip:port/share with the user webdav - everything is OK.
I try to connect with the user user1 - it does not open.
What should I do?

If it is an SMB share, you don’t share the Parent pool but a Child dataset inside

Pool = Parent, Dataset = Child

Snips from TrueNAS CORE
Shay is parent, BU2 is child and is shared by SMB

No, it’s a WebDAV share.