Is there any way to see the personal space of all users as an administrator without installing the Nextcloud client software?
ownCloud has an app for that, called “impersonate”. There was an attempt to port to Nextcloud but that did not succeed, IMO.
Actually this app exists for Nextcloud 12 and 13:
With access to the server via SSH you can see the personal spaces of the users as well.
Ah, thanks! In regards of SSH … you can see the files, but not the shares and of course only if your storage is not S3 …