Mosaic Dataset as Image Service Alpha Band

[HayleighFisher]

Hello, 

Is it possible to set the alpha channel as band 4 for an image service? If so, how? We are able to do it for a map service but we need to publish it as an image service so we can use the filtering capabilities. 

Thanks,

Hayleigh

[MatejVrtich]

I was wondering if you found a solution to this problem?

Thanks,

Matej