Auditing Groupwise 6.5 / edir user logins.

We have a Groupwise / edir user base of 7,500 + clients coupled with a
failry poor company HR system.

I need to run reports from edir when a user last logged on and correlate
them with the output I get from Groupwise 6.5 so we can delete accounts
etc.

One problem we find is that some users never logon to edir (they user ip
only access) and others never access Groupwise directly (they are
accessed via Proxy).

Is there the ability to find from any Groupwise report when an account
was last accessed (inclduing proxy access) so that we are not deleting
accounts that are actually still active.

Or does anyone have any tools or procedures they might suggest to make
this job a lot less tedious than it is.

Regards Chris Archer