Is there a way to make the UC500 ring twice before going to automatic attendant after a business is closed, and still maintain the normal ring pattern during the day?

Cisco Unified Communications Manager Express is out and available for download at http://www.cisco.com/cgi-bin/tablebuild.pl/ip-key

This product is available for the Intergrated Services Router (ISR) platform.

It probably won't be available for the UC500 for a couple of months.

3rd party products that interface with the UC500 and provide Call Accounting.

ISI http://www.isi-info.com/ or Stonevoice http://www.stonevoice.com/

I ran into a situation where Message Notification via telephone was not working. The problem was that Unity Express was sending a calling party CLID of 5000; the Voice mail pilot extension.

Here is a quick guide on customizing the Auto Attendant settings and prompts on the UC520.