I’m not fully sure what you want rewritten, but if you’re trying to send Brian a clearer message about the cloud server testing, here’s a polished version:

Hi Brian,
Where are we at with the cloud server testing so we can switch over? This is low priority for me, so no rush — just wanted to check in.

If you want it to sound more casual, more professional, or more blunt, I can rewrite it in that style too.