installing something out of backports is no option because of the unsupported state.
I can not understand why it does not work as desired, or why dovecot-solr is even provided via "maintained" (https://updates.software-univention.de/4.2/maintained/4.2-0/amd64/) when it is not working.
I wonder if i do something wrong in setting up dovecot-solr or this version is simple in an useless state.
As one of my primary target is tho satisfy my users i wonder why indexed fast full-text search is not configured by default in univention.
Regarding Dovecot-Pro, i am not sure if this is a version for me. They seem to aim at large Enterprises and Telcos. I found no prize for it but i guess it may be unaffordable for a small business with only~80 Mailboxes. Anyway i will contact my OX-Sales-Partner to clarify.
Even dovecot-ee does not seem to be unproblematical when i read this: https://forge.univention.org/bugzilla/show_bug.cgi?id=44559
I really would appreciate any help getting dovecot-solr running with the univention standard-verions.