Generally, there would be a Virtualmin user for the website management tasks.
Is it not a Virtualmin domain you want to see logs for?
You can configure the File Manager not to lock users into their home, which would allow them to traverse upward through the directory tree to the logs for the domain; assuming this is an email user in a Virtualmin domain, they would have group membership sufficient to read the logs, probably? But, this is an unusual request, since Virtualmin users are for managing websites…and Usermin is mostly a webmail client (with a bunch of extras, but because Usermin drops privileges none of those extras are administrative tasks…the actual system user has to have permission to read what you’re trying to read).
Yes, it’s a virtualmin domain.
Ok, then I might confused with the kind of accounts.
So virtualmin-user is for the technical employee of the customer who manage their web & mail themself,
and usermin-user are “end-users from customer-perspective” - means non-technical employees of the company, who manage only their own account?
Yes. Usermin is webmail plus a few other features you may want to enable. It is no for managing domains.
A Virtualmin user is for managing Virtualmin domains owned by that user.
I’ve seen people on the web suggest that Virtualmin==WHM and Usermin==cPanel, but that’s simply wrong. Virtualmin is not split like that. Usermin is not a management tool, it’s for end users to read their mail, manage mail filters and such, change their password, maybe use File Manager (for their own files, not websites), etc. You can grant them some extra privileges, but there is a user explicitly for what you’re trying to do and it is the Virtualmin user that was created when you created the domain.