There are three places where Message size is set in Exchange 2007 RTM
There are two places where Message size is set in Exchange 2007 SP1
Global Setting (RTM Only. Transport setting will change this automatically in SP1)
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Global Settings stored in Active Directory (access using ADSIEdit)
Configuration --> Services --> Microsoft Exchange --> [DOMAINNAME] --> Global Settings --> right client
Message Delivery -->
Check the settings below. They are in KB
msExchRecipLimit (default 5000)
submissionContLength (default 10240) (MaxSendSize)
delivContLength (default 10240) (MaxReceiveSize)
Transport Setting
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To show current settings:
Get-TransportConfig | fl Max*Size
To Alter:
Set-TransportConfig -MaxRecipientEnvelopeLimit
-MaxReceiveSize MB -MaxSendSize MB
Receive and Send Connectors
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To Get current settings:
Get-ReceiveConnector | ft Name, Max*Size
Get-SendConnector | ft Name, Max*Size
To Alter:
Set-ReceiveConnector "" -MaxMessageSize MB
Set-SendConnector "" -MaxMessageSize MB
http://technet.microsoft.com/en-us/library/bb124345.aspx
This is how to set Transport level message limits, but you should also ensure that there are no 'more
restrictive' limits set on Mail enabled objects such as mailbox users, distribution groups, public
folders etc that are causing a fail.
Shaun