Not yet.
This what i need to discuss. Its is very difficult to assign all the existing data under tenant. We enabled tenant option because new team joining to servicedesk platform for which we need separate .
But every thing can been seen due to shared tenant selection on the categories and other records etc by default.
THis is something serious and need to think how can we manage at this moment.
That means if already running servicedesk with No Tenants option and later we want to enable this option , We first need to move all the records under tenant so the other new teant will not be able to look their data etc. This is issue