Exchange 2007, Exchange 2010, Outlook for Mac

Setting the maximum message size for OWA, IMAP, EWS on Exchange 2007

One of our customers called in and reported that he is experiencing problems when he tries to send an e-mail from Outlook for Mac or from our OWA page. By default Exchange sets the maximum sizes for messages like this:
OWA: 30 MB

IMAP/POP (that’s Exchange Web Services (EWS)): 13 MB

Active Sync: 10 MB

If you decide that your users should have more than the default message sizes you can change the defaults by changing the following:

1. Increase the ‘maxRequestLength’ of web.config (found in ‘ClientAccessexchwebews’ & ‘ClientAccessowa’).

2. Increase the ‘maxReceivedMessageSize’ of web.config  (found in ‘ClientAccessexchwebews’).

3. Open a command prompt and type the following:

cd WindowsSystem32inetsrv
appcmd set config “Default Web Site/ews” -section:requestFiltering -requestLimits.maxAllowedContentLength: SizeInB
appcmd set config “Default Web Site/owa” -section:requestFiltering -requestLimits.maxAllowedContentLength: SizeInB

4. Do an IISRESET.

Hope that you find this helpful.

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