When enabling Remote Worker telephones to access a Public Directory, which additional configuration item needs to be configured on the Avaya Session Border Controller for Enterprise (SBCE)?

Refer to the exhibit.
After some system maintenance was completed over the weekend, a customer calling from the office states they hear a fast busy when trying to access their voicemail.
Avaya support verifies local network connectivity is up and Avaya Aura Messaging server is registering no alarms. A SIP trace displays a 404 Not Found error message.
Based on what is already working, to where can the issue potentially be isolated?

Avaya currently uses the online tool called Avaya Diagnostic Methodology (ADM) for partners to raise trouble tickets and receive assistance, and expects customers/partners to have performed the following tasks before raising a trouble ticket.
1. Clearly stated the problem.
2. Detailed the findings.
3. Clarified the problem.
When they receive the trouble ticket, what is the next step in the diagnostic methodology that Avaya Tier 3 support will perform?

Which three statements are true about Avaya Aura® Messaging (AAM)? (Choose three.)

Where can an administrator go to validate the Breeze/WebRTC cluster is synchronized to Avaya Aura® System Manager (SMGR)?