VBox | shared folder permissions

Running AlmaLinux 9.x.x as guest OS on one of my machines, using VB 7.0.x. Everything working fine…except I’m unable to give a user permission to access a shared folder. Get the 'You do not have the permissions necessary to view the contents of “sf_VBOX_share” error message.

Fine. Normally, for other OS that throw this up, all I need to do is

sudo adduser $USER vboxsf

But my attempts to do this under AlmaLinux fail miserably. Apparently, AlmaLinux requires different adduser syntax to get there from here?

Suggestions? Pointers to the obvious? Thanks in advance…

I know this is an old post, but I came across it while having the same issue.

Seems the problem was that the guide I followed didn’t include the required SE Linux configuration. Running this solved my issue
sudo chcon -R -t samba_share_t /mnt/shared

Found it here:
How to setup Samba Server and client on AlmaLinux - LinuxConfig