I am having a problem where the user who has access to the shared mailbox that is in the microsoft exchange online is trying to send an email with an attachment to the users of the local mailbox, but this one is returning with error.
This message could not be delivered because it is too large. The limit is 800 KB. This message is 11940 KB
Remote Server returned '550 5.2.3 RESOLVER.RST.SendSizeLimit.Sender; message too large for this sender'<o:p></o:p>
Remote Server returned '550 5.2.3 RESOLVER.RST.SendSizeLimit.Sender; message too large for this sender'<o:p></o:p>