How can i disable notifications from external meeting requests?

nNifty that's the exact reason why i posted the question.

[PS] >Set-RemoteDomain -MeetingForwardNotificationEnabled $false
 
cmdlet Set-RemoteDomain at command pipeline position 1
Supply values for the following parameters:
Identity: *
WARNING: The command completed successfully but no settings of 'Default' have been modified.

With Get-RemoteDomain | fl i get:

[PS] >Get-RemoteDomain | fl
 

DomainName                        : *
CharacterSet                      : iso-8859-1
NonMimeCharacterSet               : iso-8859-1
AllowedOOFType                    : ExternalLegacy
AutoReplyEnabled                  : True
AutoForwardEnabled                : True
DeliveryReportEnabled             : True
NDREnabled                        : True
MeetingForwardNotificationEnabled : False
ContentType                       : MimeHtmlText
DisplaySenderName                 : True
TNEFEnabled                       :
LineWrapSize                      : unlimited
MinAdminVersion                   :
AdminDisplayName                  :
ExchangeVersion                   : 0.1 (8.0.535.0)
Name                              : Default
DistinguishedName                 : removed
Identity                          : Default
Guid                              : 6bbf5caf-e1a4-4415-9f5f-74958d93052a
ObjectCategory                    : wd.loc/Configuration/Schema/ms-Exch-Domain-Content-Config
ObjectClass                       : {top, msExchDomainContentConfig}
WhenChanged                       : 17-3-2008 17:10:52
WhenCreated                       : 20-11-2006 16:05:22
OriginatingServer                 : removed
IsValid                           : True

Still receiving these messages:
Your meeting was forwarded

<user>  has forwarded your meeting request to additional recipients.
 
MeetingForwardNotificationEnabled has been switched True/False several times now to see if it adjusts the setting correctly. It does so but it doesn't seem to have any effect. The notification messages are sent either way.

I forgot to mention it's a forward within the internal domain.

What happens if I set remote domain same as my own domain, because this is what it does right? Will it affect anything else?

nNifty thanks for your input so far,  you've been very helpfull.

But the thing is I can't afford any more tests on the clients setup. Currently Microsoft is investigating this problem for me too. One of their engineers provided me with a solution to turn it off per user. That works so I'm able to script it but i'dd rather not, it's tricky because I don't know what'll happen if I want to change it for 2000+ users.

They're still testing for a way turn it off for all users at once.  Optrust, I will post a final solution when I get one from MS.

Meanwhile I still encourage our fellow EE experts out there who happen to know how to get around this one, to post your solution.

Thank you.

First get the users' settings:

get-mailboxcalendarsettings <%usermailbox%> | fl

set-mailboxcalendarsettings <%usermailbox%> -removeforwardedmeetingnotifications $true

Still no final solution from MS.

Ok this seems to be a bug in the software. I'll post the solution later on.