I have changed the name of a conference room resource calendar on the Exchange server but the name change is not being reflected in the end user's Outlook clients. I tested a remove/re-add and that worked but I cannot have everyone in the company do this. Is there anyway to force the change down to the Outlook clients?

I have already confirmed that I changed the name and the display name, as I posted this question in Exchange forum originally: https://social.technet.microsoft.com/Forums/exchange/en-US/cb7d1de1-bf09-483a-8993-d11f44cc5bfd/display-name-of-shared-calendar-in-outlook-clients-after-name-change-on-the-exchange-server?forum=exchange2010

Have you tried in Online mode?

Make sure the Room name in GAL is updated. I think when the shared calendar is added in Outlook, the display name is resolved to an AD object. Though the dispaly name is changed, the AD object in AD location is not changed and can be still resolved. Therefore, the room display name is not changed immediately.

If you remove the calendar and add it again, the new added name should be resolved from GAL. And GAL is updated with the new display name. Then the new name would be shown for shared calendar.

I tried online mode. I toggled in and out of cached mode to see if that would make a difference and no go.

It is updated in the GAL, but looking to change for anyone who has it already added without sending notification for them to remove and re-add....