I know this is confusing and debated about how to explain everything initially.

During the day incoming calls are answered by the attendant. The attendant transfers the calls to the tenant and if they are not in their offices, the calls are forwarded to the tenants own mailboxes.

After hours the management company did not want the calls to be answered by the main greeting. They wanted the calls to route to the tenants mailboxes where the tenants greeting is heard by the caller. In order for it to work this way, each tenant was set up in their own ring group. This has not been a problem until the other day.

I don't know if this helps or not...if you need more info on the set up, please let me know.