Exchange internal users attachment size restrictions

hi Experts,

We have a Exchange server 2010. We want to restrict the attachment size of internal users. External users it is 20 MB, but for internal users I want to restrict it to 3 MB.
Is it possible, if so how?

Thanks your help in advance
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Muhammad BurhanManager I.T.Commented:
Ankit PareekOnline MarketingCommented:
Just follow the all steps mention in below article and you can easily set your message size limit on 3MB easily
Alexei KuznetsovMicrosoft Outlook MVPCommented:
In Organization Configuration -> Hub Transport -> Global Settings -> Transport Settings, set "Maximum send size" to 3072 KB.
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ukitsmeAuthor Commented:
Muhammad Burhan,
I don't think there is a option in Transport. When you create the rule, you select from 'inside the organization'. in Action you dont have attachment option.
ukitsmeAuthor Commented:
Alexei Kuznetsov and Ankit Pareek,

Doesn't that include affect internal and external emails.
ukitsmeAuthor Commented:
Sorry I have to edit my question. Internal emails i.e. communication between internal users should have a restriction of 3 MB and external emails should be 20 MB i.e. Internal to External emails. and External and Internal emails
ukitsmeAuthor Commented:
In Transport rule you can block emails under  a particular size i.e. I can block emails over 3MB but not the other way around.
Muhammad BurhanManager I.T.Commented:
lets try this,

set organization limit as 20 MB

make a new rule and select "from people" and "sent to people" condition with "when the size of any attachment...." and type * in "from address" and "to address".

in action select "send bounce message to sender with enhanced status code" and fill desired text in Message/Reason fields.

check results.

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ukitsmeAuthor Commented:
Muhammad Burhan,

1) In conditions you select Inside Organization
2) In actions you are asking to send bounce messages, but where is the condition. If I do that it will send rejection message to all users.
ukitsmeAuthor Commented:
Thanks Muhammad. It worked. Setup rule as per below
Setup a transport rule from users internal users, sent user internal users, attachment size limit 3mb and error reference 5.7.666.
ukitsmeAuthor Commented:
Thanks for help Guys
Muhammad BurhanManager I.T.Commented:
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