By default it appears only 1 auto-attendant menu is configured - 990/991 (per port assignments).

How do I setup the lines to answer with a specific auto-attendant based on time of day (day and closed menus)?

If you have only one tenant, set up the Auto Schedule table in MB991 for a Day Greeting #1 and Night Greeting #2

Yep, I figured it out. This was my first CIX install so sorry for all the dumb questions...

There is no such thing as dumb questions, only dumb mistakes!

Thanks for the update.