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How do I change the attachment size limit in Microsoft Exchange 2010?

Posted on 2010-11-09
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Last Modified: 2012-05-10
I am have a user who wants to attach a file larger than 10MB in Microsoft Exchange 2010. I have changed every size limit except the following...

ExternalDsnMaxMessageAttachSize

InternalDsnMaxMessageAttachSize

I have tried running this cmdlet that someone posted as follows but I get an error:

Set-TransportServer ” SERVERNAME ” -ExternalDsnMaxMessageAttachSize xxMB
Set-TransportServer ” SERVERNAME ” -InternalDsnMaxMessageAttachSize xxMB

The error is as follows:

The position peremeter can not be found that accepts argument "ExternalDsnMaxMessageAttachSize"

I have attached an image of when I run the "get transportconfig" command.


 These are the two values I need to change...
I have read and did all the steps for the other send and recieve parameters from the following site which was recommended on another post. Everything else is setup properly I just cant seem to change the internal and external attachsize limit. IT still shows 10MB. Thank you in advance for any help! =)

Also I have rebooted the server after I changed my other settings as well.
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Question by:Jryals8900
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LVL 6

Expert Comment

by:Shack-Daddy
ID: 34094231
Try this:

Get-transportserver | Set-TransportServer -ExternalDsnMaxMessageAttachSize 40mb -InternalDsnMaxMessageAttachSize 40mb
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Expert Comment

by:dsmile
ID: 34094293
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Author Comment

by:Jryals8900
ID: 34094360
Unfortunately I got another error. I will attach it so you can see.
exchange2010errorsz2.png
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Author Comment

by:Jryals8900
ID: 34094395
dsmile I did all the steps in the second link that you posted. The first link is regarding the Outlook 2010 size limit which is not a problem at the moment for me. Currently my 2010 Exchange is listing my maximum internal and external message attach size limit at 10MB. Thanks for the try ;)
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Accepted Solution

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Shack-Daddy earned 500 total points
ID: 34094398
I think you are on the wrong track, trying to use the wrong parameter. That's why you are getting the errors. Look at this thread for the actual variables you should be changing:

http://www.tek-tips.com/viewthread.cfm?qid=1594519&page=1
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Author Comment

by:Jryals8900
ID: 34094821
Shack-Daddy I believe you may be correct...I am testing now and will award you points if all pans out properly.  That internal and external dsnmessageattachsize is confusing as hell...makes me wonder what that even does

stay tuned...
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Author Closing Comment

by:Jryals8900
ID: 34104974
Shackdaddy you were correct! I made the required changes but didnt fully test because I saw the two values at 10MB. Even though these values state attachsize they do not matter because it works internally and externally now. Thanks for your help!
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