![]() ![]() You can find all Exchange Online limits, including message size limits, in a single, comprehensive doc. Exchange Online also limits the number of attachments per message to 250. To change that, you need to modify the Exchange EWS web.config file(s) and configure some of the Transport Service settings via the Exchange Management Shell, as shown later in this article. In Exchange Online, the message size limit is set to 150MB (for Outlook on Windows, 112MB for OWA and a much lower 35MB for Outlook Mac likely Outlook Mac 2011). The range is from 0 to a whopping 2147483647. By default, MS Exchange Server 2010/2013/2016/2019 does not accept items bigger than 30 MB to be uploaded via EWS. If you can’t reboot, you can try to restart the Exchange services and see if that works.Īlso, you can change the max number of recipients in the Global Transport settings dialog. That is all there is to it! Note that the largest value you can enter into the maximum receive size and maximum send size in KB is 2097151, which is basically 2 GB! Hopefully, no one in your organization needs to attach a file that is 2 GB in size.įinally, you need to make sure you restart your Exchange server for the new size limits to take effect. We use ShareFile to send large attachments and their plug-in only works when an attachment makes it into the message. Server Configuration – Hub Transport – Receive Connectors Pane – Properties of Default MaximumAttachmentSize set to 0 (Unlimited) and 1024000 (1GB) ComputerHKEYCURRENTUSERSoftwarePoliciesMicrosoftoffice16.0outlookPreferences. Organization Configuration – Hub Transport – Global Settings – Properties of Default SendĪnd you can do the same thing for the Receive Connector here: You can change the Send Connector by going to the following location: Once you have done that, you need to modify the send and receive connectors. Here you will be able to edit the transport send and receive limits. ![]() Organization Configuration – Hub Transport – Global Settings – Properties of Transport Settings In order to change the size limits, you have to make the change in several locations within the Exchange Management Console.įirst, you need to modify the global settings at this location: ![]()
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