OME and stale warranty data

Does OME cache warranty data?

If so is there any way to purge the cache and force OME to refetch all warranty data again?

I have about 30 servers that are showing "There were not any service agreements found for this service tag." but if I cut and paste the service tag from OME into http://www.dell.com/support/my-support/us/en/04/ I see the correct warranty data.