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:

Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 1
  • 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:

Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 2
  • 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.

Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 3
  • Default view of the current config.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 4
  • Step 1 -> Change the value to 30.
  • Step 2 -> Click Save.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 5
  • Progress Screen.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 6
  • Back in the Exchange Admin Center (EAC) you can now see that the new value is 30MB.

Configure Receive Connectors:

Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 7
  • 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.

Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 8
  • Current config.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 9
  • Step 1 -> Change the value from 36 to 30.
  • Step 2 -> Click on Save.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 10
  • Progress screen.
Configure maximum message size limit on send-receive connectors in exchange 2013
Configure Maximum message size limit on Send-Receive Connectors in Exchange 2013 11
  • 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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