CIFS mount giving permission denied with other user than root

[Ralms]

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Hi everyone,
I'm running into a weird issue that I was hopping someone could provide me some insights.
I have a container running Plex, which has a CIFS volume attached to it, in Writable mode.
Plex runs on a specific UID and GID, not root, and the issue I'm facing is that Plex is getting Permission denied doing write operations on the CIFS volume.

If I enter the container with a bash console, with the root user (UID 0), I have write permissions fine, but not with any other user.

Considering that the SMB share credentials used in the CIFS volume have Read/Write, the volume is mapped as "writable" confirmed by testing with "root" user on bash console, however failing with any other user with "Permission denied", I don't understand what am I missing.

Any ideas?

Thank you.
(Portainer Business Edition 2.21.1, Ubuntu 22.04.4 host, Docker 27.1.2)

[tesla-srt]

I'd like to bump this.
I just ran into a similar issue and completely derailed my architecture.
If anyone has a solution, please link me 🥂

[Sebtous]

Bump for me as well

[Ralms]

The lack of engagement from the Portainer team after 1 year, is concerning.