VDOMs and Wireless - can someone point me to the documentation?

 

and can't belong to multiple vdoms at the same time. To make your idea sharing a cluster of FAPs at one vdom (like root) and share them with different vdoms, you just need to route those SSID networks (WLANs) through vdom-links to connect them to each vdom separately.

Not sure about that. I'm sure you can set multiple WLANs for an array of APs and associate these in various vdoms.

also take heed of ;

"

Sharing Tunnel SSIDs within a single managed AP between VDOMs as a Virtual AP for multi-tenancy (439751) Support has been added for the ability to move a tunnel mode VAP into a VDOM, similar to an interface/VLAN in VDOMs. FortiAP is registered into the root VDOM. Within a customer VDOM, customer VAPs can be created/added. In the root VDOM, the customer VAP can be added to the registered FortiAP. Any necessary firewall rules and interfaces can be configured between the two VDOMs. Syntax config wireless-controller global set wtp-share {enable | disable} end

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So for the OP, your answer is yes. A single array and share between 2 or more vdom is good. Control/Management plane of the AP is still within management but SSID and VAP can be delivered in a multi-tenant.  I do that today in my home with a WLAN in 2x vdoms and that's in a sml SOHO FGT.

Ken Felix