I have a UCS server with OnlyOffice app installed from Catalog Apps. I also have a nextcloud server (non-UCS app) on my local area network (LAN). My nextcloud uses a self signed certificate, has a local IP, and a local FQDN nc.nest.lan
What would be the procedure for my nextcloud server to use OnlyOffice app (the WOPI-Host from UCS)? My UCS server has a local FQDN ucs.nest.lan
I understand that adding integration app to my nextcloud sever and configuring the URL address is not enough to authenticate my nextcloud server with UCS.
Do I have to make a new self signed certificate with Subject Alternative Name (SAN) extension that includes both ucs.nest.lan and nc.nest.lan, and put it into my nextcloud and ucs servers?
When and how should I join my nextcloud server to the UCS domain?