How to set the Default Calendar permissions for all users in Exchange 2000, 2003 and 2007

Configuring appropriate default calendar permissions globally in an Exchange environment can be accomplished for Exchange 2000, 2003 or 2007 with a handy tool called PFDAVadmin found here: http://www.microsoft.com/downloads/details.aspx?familyid=635BE792-D8AD-49E3-ADA4-E2422C0AB424&displaylang=en    The Exchange 2007 commandlet Set-MailboxCalendarSettings only works for resource mailboxes and won’t accomplish what PFDAVadmin can for calendar client permissions.  The only commandlet currently that mirrors this capability simply retrieves…

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