Possible to use a single satellite in an Orbi network as an AP with a different SSID?

I have an RBR850 and 4 RBS850s in my home network. One of the four satellites is in a separate building on the property that serves as my office and is hard-wired to the router. It is probably about 200' from the nearest of the other 3 satellites in the main house and as a result I will occasionally get situations where my devices seem to want to stay connected to the other satellites that are farther away and get very slow speed and not switch to the one that's in the office. 

I know the entire Orbi system can be switched over to AP mode, but is there a way to only use this one satellite as an AP, or some other way to give it a different SSID? Or to only enable the guest network on the one satellite? That would enable me to force my devices to switch to that closest satellite if necessary by manually choosing the different SSID. 

My other option I assume is to get a separate router and set it as an AP, but it seems like keeping all the administration of the network through the Orbi system would be preferable if there's a way it can work.

Thanks!