When attempting to send an email to a large amount of recipients, you may see the following error;
This message wasn’t delivered to anyone because there are too many recipients, the limit is {number}. This message has {number} recipients
To check what the limit is set to launch the Exchange Management Shell, and ecxecute the following command;
[box type=”shadow”]Get-TranportConfig[/box]
To raise the limit (in this example to 2000) use the following command;
[box type=”shadow”]Set-TranportConfig -MaxRecipientEnvelopeLimit 2000[/box]