Someone posted a question to the GroupWise support forum asking if any mailbox data is available in the GroupWise Admin Console. Unfortunately, only the mailbox size is available as a column in a user list. The poster specifically requested that the mailbox size limit would be useful to have.
This utility, MailboxSizeReport.exe was written in python using the GroupWise Rest API and compiled as a Windows (64-bit) application. Included in the download is a sample config file used to populate information on how to connect to the GroupWise Admin Service.
The utility will create an Excel spreadsheet showing all GroupWise users along with some user mailbox information. The information provided includes the GroupWise ID (Dom.PO.User), their current mailbox size in MB's, the mailbox size limit in MB's, the size threshold for warning users, and if the limits apply to the user's caching mailbox.
Please see the help function in the utility for further details.