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The below outlines how to configure the limit in Exchange 2016.<br />
<a href="https://technet.microsoft.com/en-us/library/bb124708(v=exchg.160).aspx" rel="ugc">https://technet.microsoft.com/en-us/library/bb124708(v=exchg.160).aspx</a>
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seems like is not related to attachment , i don't have issues from microsoft outlook the issues only from OWA when i'm going to attach file more than 25MB i'm getting the error )The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 25 MB) , i used the command Get-Mailbox &lt;identity&gt; | fl MaxSendSize,MaxReceiveSize<wbr /> and it is showing unlimited ! the issues from OWA .
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Hello ,<br />
<br />
I have upgrade it the exchange server 2016 to latest relaease CU5 , when i need to upload files more than 25 MB i'm getting this error message (The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 25 MB) , please how to increase the size at least for 80 MB .<br />
<br />
Thanks,
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Hello ,

I have upgrade it the exchange server 2016 to latest relaease CU5 , when i need to upload files more than 25 MB i'm getting this error message (The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 25 MB) , please how to increase the size at least for 80 MB .

Thanks,

Exchange 2016 OWA attachment issues

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.