Dear guys, we have an Exchange 2016 on-premise server and would like to increase the attachment's size of users' emails to 100 MB. We did some research and followed but still got the error "The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 25 MB: smex_12.0_ag.pdf. "
when attached a file that is bigger than 25 MB into an email. Could you please suggest?
Attached pictures are our settings, we restarted IIS, Transport services, even server itself but did not help!