Hi Chris,
MWI does not work with Group Mailboxes but you can configure Message Notification. Have a look;
General delivery mailbox (GDM) This mailbox is assigned to a group of subscribers. All members in the group have access to the mailbox. When a caller leaves a message in this mailbox, no MWI is turned on. Instead, when a member logs in to the personal mailbox, the mailbox menu allows the member to access the messages in each GDM to which the member belongs. Only one person can access the GDM at a time. After the first person saves or deletes a message in the GDM, the message is no longer played as "new" for any subsequent members.
From this CUE 2.3 doc;
http://www.cisco.com/en/US/products/sw/voicesw/ps5520/products_administration_guide_chapter09186a00806f11ef.html
You can setup the following for Group Mailboxes;
Enabling Message Notification for a Subscriber or Group
Before configuring message notification on a device for a subscriber or group, enable the message notification capability for the subscriber or group.
Starting in Cisco Unity Express configuration mode, use the following command to enable message notification:
voicemail notification owner owner-id enable
where owner-id is the username of the subscriber or groupname of the group that requires the message notification capability.
The following example enables message notification for the subscriber user5 and the group sales:
se-10-0-0-0# config t
se-10-0-0-0(config)# voicemail notification owner user5 enable
se-10-0-0-0(config)# voicemail notification owner sales enable
se-10-0-0-0(config)# end
se-10-0-0-0#
These notifications can be sent to the following devices:
Cell phone
Home phone
Work phone
Numeric pager
Text pager
E-mail inbox
From this doc;
http://www.cisco.com/en/US/products/sw/voicesw/ps5520/products_administration_guide_chapter09186a00806779cd.html#wp1007555
Hope this helps!
Rob
