I've spent way too much time troubleshooting multiple Nextcloud LDAP issues this week. The first was me moving the user. This was easy to figure out, as I had moved my Bookstack user a couple weeks back and realized it was the same issue. Second was the sadly short password that the LDAP users and groups backend supports. Apparently I knew this in the past but forgot to save the short password for this service account. I was trying to use an unfortunately long one. My ADAudit+ reports tomorrow are going to be an absolute shitshow.
While I was working I updated to 30.0.4. Fortunately Nextcloud updates are the easy part.