They dont need to make an API for it but just make it fully automatic, I think.

I've asked our dev that has the most experience with license management to help me find a solution to this problem.

Thanks! Please note that i dont have Unity Pro and my subscription page is empty.
I have access to the other computer through Virtual desktop / teamviewer but even with Unity close ...

Yes, so i already tried the active flag of course. After I install only one of the cards is active anyway so i think this is already handled correctly.
Whatever i do with the settings i will get that error. And afaik yes this is consistent behavior in any scene and after each installation.

Since i ...

I have this issue, too. Using two computers and Unity is exited on the other computer yet i get this problem. What to do?

The Octane extension displays your tier as 0 before initialization (it is only resolved then). Can you go to version control and check that you have installed Tier 1 there?

I had this problem too and my issue was that i installed Tier 2. When i switched to Tier 1 the licencing dialog stopped ...

Can you check if your drivers are up to date? And what happens when you disable your current active GPU, and enable the other one?

They are updated only a few days ago. What do you mean by disable though, the active flag in PBR Render settings tab or through device manager?
I'm guessing it will ...

Hi,

I have two GPUs in my computer, (needed for dual 4k @ 60hz), and when i try to render by Octane in Unity I get this error:

Can't activate device 0, because the maximum limit of 1 GPUs has been reached.
CUDA error 999 on device 0: unknown error
-> failed to bind device to current thread
device ...

I agree. It has to be able to both do native Unity real-time rendering and do Octane rendering without switching materials.
Also, for emissive component, Unitys default Standard PBR material have an emissive channel? Why not use this? If its not enough, maybe Octane can extend the standard material ...