Share an e2e folder?

I would like to have an end-to-end encrypted folder that is shared to other users on the same cloud. I tried setting it up, but had strange problems. Is this official supported? I found one way that seems to work: set up two separate accounts that have the exact same e2e key on the server. I copied the key files server-side.

Also, is there a way to cache the e2e password client side? Its a pretty big password to have to type on reboot.

Actually, it only worked for a tiny text file, it failed to sync once I put a bunch of files in it.