daminao - nope, a group voice mail box will deliver the VM to each member of the group. However, it is delivered to the members’ personal VM boxes and the deletion of the VM by one member does nothing to the other members’ voice mails (same message). In your example, the VM should still be present in the box for 202 and 203. Only 201 deleted or read it, but this should have no impact on 202 & 203. Please check.
Unless there is something new, each member must delete the message individually, and then someone also needs to delete from the group box as well.
There are two schools of thought on the issue -
Use the group VM to deliver a message to a group and then have the VM react to the first user of the VM group who reads, deletes, etc., such that the impact of the action is felt by all boxes to include the group box.
Use the group VM to deliver a message to a group and then allow each member to manage the VM individually so that the actions of one member have no bearing on any other member to include the group box. This is how it currently works. One reason being that say for example that I am the boss (my wife is really) and that the office is pretty busy, but bad weather is coming in and I decide to close the office early. I can leave a group mail that will get sent to all in the group (everyone to include remote workers) about the early closing. I do not want the first person who retrieves the message and then delete it such that all the other employees never get it and that lucky guy goes home while the others stay because they don’t know. Bad analogy, but you get the idea.
In this manner all who get the message can react to if there is a need. The bad part is that if it is a generic message such as “call me back” then not all need to respond, but they do need to coordinate among themselves so not everyone does call back. .