possible to pca from AD PC to non AD PC?

SMC v 7.5.3153 in AD environment.

Client pcA plugin is 12.6.8556.

pcAQuickConnect on my PC is 12.5.4.8211 SP4.

I can pcA / pcAQC to any AD PC that has SMA with pcA plugin. However, we have a classroom of PC's that is not (yet) part of AD. I can initiate a pcA connection and as normal I am prompted for username, password and domain. However it does not accept my credentials (as it does when pcA to an AD PC). Is there a way to pcA from an AD PC to a non AD PC? Thank you!