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Exchange 2010 and Attachment size limits

July 20, 2012 by jer0dh

I’ve set and confirmed no limits are set on attachment sizes and I’ve been able to send out attachments over 8MB no problem on my PC and in Outlook, but I have one Mac user using Web Access getting “The following files weren’t attached because the exceed the maximum size limit for attachments (5MB): filename.ext”

This didn’t make any sense. But luckily another user posted about this same problem and had the solution:

http://www.camm.id.au/?m=2011

Even though the limit was set as unlimited, the outlook web client for this user saw it as not set so it applied a default limit of 5MB. Crazy. This command fixed it..and a restart of IS service:

set-transportconfig -maxreceivesize:1024MB -maxsendsize:1024MB

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