Afaik there is no software that allows you to sync with x servers and concurrently with x clients and keep everything in sync. You can only have one server for a “server wins” architecture. Ofc there is the possibility of mirroring or clustering on the server side but with 2 different types of servers (fruux and NC for instance) this would not be possible for various reasons.
Setting color of single events discarded after sync
With Business Calendar it is possible to assign colors to specific events independently from the overall calendar color. After DavDroid sync, the individual colors are discarded. I disabled also “Manage calendar colors”, but I don’t think this is related.
Is this a (intended) behavior on the DavDroid side? Or just an issue on the Business Calendar side?
Please follow up at Single-event colors are reset when syncing.