Idocs in Users Inbox? Table or Function Module

Hi,

We have around 9000+ error Idocs (status 51) for which we had configured the workflow, so that they are directly transffered to the users SAP Inbox.

Now we would like to see whether they are still in the Users inbox or the users have acted on the error Idocs.

Is there any table/function module from which we can get the status of these Idocs at one shot whether they are lying in the users inbox or not and if they are in users inbox then whose inbox they are in.

Any help would be appreciated.

Thanks in advance.

Mick