How does a user transfer caller to a Guest Mailbox on a Partner messaging R1 when the user number is higher than 57?
When a call is answered by the auto attendant, and a caller requests to transfer to a mailbox, Partner Messaging system knows what mailbox numbers exist and transfer accordingly. However, the Partner ACS doesn’t know that there can be mailbox numbers above the ACS’s logical extension numbers (10-57) and will err. out if a user tries to transfer a call to an extension above x57. The customer needs to create a mailbox, within the logical range of the ACS, and assign it as an Auto Attendant Mailbox. You can transfer the caller extension number, which routes back in to the Auto Attendant, allowing the caller to reach any mailbox within the Partner Messaging System.
