How to correctly increase the size of sending a file attachement thru exchange 2010

Hi James,

Your Exchange is configured in order not to allow heavy attachement which is good practice in order to avoid backpressure issue.

I suppose you have the same restriction in OWA and Outlook?

Cheers

For all of exchange, you can set the maximum Send size on the Send Connector and the Maximum receive size on the Receive connector. You can also set the maximum size on each mailbox. BTW, 30 MB is large and even if you can send it, the receiving side may reject it.

Yes but we have some users that send larger then the default size thru their outlook client and i thought i took care of that but everytime this person tries to send a file attachement he is getting this error. I also went into the registry on the client pc and made changes in it to allow him but he still gets this error and also 2 other people are having the same issue.

Are they sending to an external receiver or internal?

i have ran this command on our exchange server and this is the results:
1. Get-TransportConfig |fl max*size
    MaxReceiveSize : 976.6 MB (1,023,998,976 bytes)
    MaxSendSize    : 976.6 MB (1,023,998,976 bytes)

They are sending to an internal address.

And you have similar Message size restrictions on the affected user mailboxes?

On the person i edited his registry he was able to send out that moment but when he tried a few days later he called back with the same issue.

This is what i edited in the registry:

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook\Preferences

create Value type: DWORD
Value name: MaximumAttachmentSize
Value data: 0

Yes that is correct.

ON that persons mailbox, in the EMC, go to properties and see what the Message size restrictions are set to.

If the issue is really exchange, then there are several places it can happen. I use 2013/2016 and have to look back to remember 2010. However, this site has a pretty good overview of message size restrictions and what can cause issues. See if it helps.
https://exchangepedia.com/2007/09/exchange-server-2007-setting-message-size-limits.html

Ok in the EMC the message size restrictions on this person is set to 999999kb for sending out.
nothing is checked for receiving.

Is there a receive limit for the person he or she is sending to?

Here is the setting of the transport properties under Global Settings

Transport limits:
maxmum receive size: 999999
Maximun send size: 999999

Is there a command to set a global limit for all users.

Thanks