Running Exchange 2010 R2 Rollup 2. How can I set ProcessExternalMeetingMessages: $true as a default for any new mailboxes that are created?

Use Powershell to create the resource mailboxes and set it there. Isnt that a setting reserved for resource mailboxes however?

I am wanting to set it is a default for UserMailboxes. I need this for our BES environment. Without this setting, any appointments originating from outside our Exchange, will show up on the Blackberry as a mail item and not an appointment.

Ok, with Powershell use the Set-CalendarProcessing command to set those when creating the new mailbox. You could script something or just pipe it in: Get-mailbox <alias> | Set-CalendarProcessing -ProcessExternalMeetingMessages: $true or do it for a whole store/server. etc..

If I do it for the server, would it be the CAS server or the mailbox server? I already have done this for all existing accounts, just want to make it the default so I don't have to script anything in the future.

For the whole server, pipe in the mailboxes by server or store etc..., but since you have done it for the existing mailboxes, soudns like you are covered.

If I do it for the server, would it be the CAS server or the mailbox server? I already have done this for all existing accounts, just want to make it the default so I don't have to script anything in the future. It would be a mailbox server and for all mailboxes in a MailboxServer Get-mailbox -server MailboxServerName | Set-CalendarProcessing -ProcessExternalMeetingMessages: $true For all mailboxes in a Mailbox Database Get-mailbox -Database "Mailbox Database" | Set-CalendarProcessing -ProcessExternalMeetingMessages: $true Also every time u create a mailbox u will have to set "ProcessExternalMeetingMessages" for it specifically. You cant make it default somewhere, except running the command after u create the mailbox. Regards, Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

Well that just blows. I was hoping I could make it the default for new mailboxes.

Not via EMC, but if you create the mailboxes with Powershell, absolutely!