Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013

This simple guide shows you how to configure your send/receive connectors and change the maximum send/receive message size.

Open up the Exchange Admin Center:

• Step 1 -> Enter in the user that has access to create databases. E.g. Domain\username
• Step 2 -> Enter in the password
• Step 3 -> Click Sign in

Send Connector:

• Step 1 -> Click on Mail flow.
• Step 2 -> Click on Send Connectors.
• Step 3 -> Click on your defined send connector.
• Step 4 -> Click the Pencil to edit the current send connector.

As you can see the maximum send message size is 10 MB. In this exercise we will change it to 30MB.

• Default view of the current config.

• Step 1 -> Change the value to 30.
• Step 2 -> Click Save.

• Progress Screen.

• Back in the Exchange Admin Center (EAC) you can now see that the new value is 30MB.

Configure Receive Connectors:

• Step 1 -> Click on Mail Flow
• Step 2 -> Click on Receive Connectors
• Step 3 -> Click on the Default Frontend connector.
• Step 4 -> click the Pencil to edit the current connector.

As you can see the maximum receive message size is 36MB, in this exercise we are going to change this to 30MB.

• Current config.

• Step 1 -> Change the value from 36 to 30.
• Step 2 -> Click on Save.

• Progress screen.

• Back in the EAC you can now see the value has been changed.
• Complete this for any other connectors.

Hope it helps.

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