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I followed the instructions to increase the attachment size as shown here: https://www.microsoft.com/en-us/microsoft-365/blog/2015/04/15/office-365-now-supports-larger-email-messages-up-to-150-mb/

Its been a couple of days since I waited for the changes to go in but I still notice the issue: The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 34 MB

What else I can do to increase the size of the attachment?

Based on the questions - I tried it on OWA with an existing mailbox.

Coder
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1 Answers1

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You can follow up my post here (if it's an exchange on-premises)

https://messaging.faboit.com/2016/09/exchange-connectors-to-send-and-receive.html

You'd need to increase it in 2 sites, on the connector, and on the transport config.

Jose Ortega
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