>Does anyone know the particulars on how expiration works.

There's information in the Admin Guide, and under the  EXPIre Inventory
entry in http://people.bu.edu/rbs/ADSM.QuickFacts .  The process was
recently discussed on ADSM-L, relative to Cancel Process vs. Cancel
Expiration - also noted in QuickFacts.

  Richard Sims, BU