James Paterson Unlimited Unlimited Solution Exchange attachment size limit C:\>Get-Mailbox | ft Name, MaxSendSize, MaxReceiveSize This is the mailbox of the user that sends the message. The fourth and last command to check is the user mailbox max send size and max receive size. C:\>Get-SendConnector | ft Name, MaxMessageSize The third command that we will check is the send connector max message size. The second cmdlet is to get the receive connector max message size. Transport configurationįirst, we will check the transport configuration max send size and max receive size. We need to run the following four commands. Run Exchange Management Shell as administrator. We will check the current Exchange message size limit in the Exchange organization. Why do users get this notification, and what is the solution for Exchange maximum attachment size limit? Get information attachment size limit Exchange The following files weren’t attached because adding them would cause the message to exceed the maximum size limit of 10 MB. When sending the email, a message shows up: