MDI is picking up changes in my domain rather quickly as I expect.  Why does it take MCAS so long to obtain this info? I am seeing missed alerts never coming or on a massive delay. I didnt think it was a literal 12 hour delay for each alert from MDI>MCAS.  Is there anything I can look at with troubleshooting?

If you see the data in MDI but not in MCAS, you should open a support ticket, as this will need to be checked in the backend.