I’ve noticed something odd. I’m not entirely sure when it started, and I’m not entirely sure why this “feature” exists (as it strikes me as being rather pointless); but, by default, the subject line of meetings gets replaced by the meeting organizer’s name in Exchange resource calendars.

The fix, happily, is quite simple.  In the Exchange Management Console, open the Properties of the resource mailbox and go to the “Resource Information” tab. There, un-check the check-boxes labelled “Delete the subject” and “Add the organizer’s name to the subject”.

Alternatively, this can be set via the Exchange Management Shell with the following command:

set-mailboxcalendarsettings -identity meetingroom -deletesubject $false -addorganizertosubject $false