We have a Exchange 2013 server running on Windows Server 2012 R2. We use Outlook 2010 clients. I am unable to receive emails with attachments of 15 MB. I have raised the attachment size limitations using the Exchange 2013 ECP (Exchange Control Panel). I have raised the limits in the following areas: Recipients -> Mailboxes -> (edit user mailbox) -> Mailbox Features -> Mail Flow -> Message size restrictions Settings are 51200 KB for both sent and received.
Next area edited in ECP is Mail Flow -> Receive connectors -> I have set 50 Mb for maximum message size in all receive connectors.
Next area edited in ECP is Mail Flow -> Send Connectors -> I have set 50 MB for the maximum message size on the send connector.
After making these changes I restarted the server and am still unable to receive emails with large attachments. I am testing by sending the emails (w) attachments from another Exchange server in the outside world to the Exchange server in question. I know they are being sent because I can successfully send them to my Gmail account. Please let me know if I am missing something here. Is it possible that this cannot be accomplished form the GUI (ECP)? Do I need to use Power Shell? Any help would be greatly appreciated.