If you need to change the max throughput size on an exchange server
- Powershell access to the exchange server
Create a powershell *.ps1 file containing the following.
get-transportconfig | Set-TransportConfig -maxsendsize 100MB -maxreceivesize 100MB; get-receiveconnector | set-receiveconnector -maxmessagesize 100MB; get-sendconnector | set-sendconnector -maxmessagesize 100MB; get-mailbox | Set-Mailbox -Maxsendsize 100MB -maxreceivesize 100MB
This assumes a desired size of 100MB, but switch out the 100MB as needed to whatever size you want.
Run the file(as administrator)