Exchange 2013 5MB attachment limit OWA

My client uses OWA to send and receive emails but cannot send attachments greater than 5MB

We changed eveything in web.config and the ECP and rebooted the server but alas no luck

We tried virtually every browser and it still does it

Transport limits are both in and out at 50MB
BosaloskiAsked:
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Rajitha ChimmaniCommented:
Check if there are any limits applied at mailbox level. And how does it work in Outlook?
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BosaloskiAuthor Commented:
Outlook works just fine (only 1 user has it)
The rest have to use OWA
Already checked the limits at the mailbox limit and they are wide open
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Peter HutchisonSenior Network Systems SpecialistCommented:
What a about the Receive Connectors and Send Connectors used by the Hub Transport roles?
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Rajitha ChimmaniCommented:
Do you have the exact error message or is it a undeliverable?
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BosaloskiAuthor Commented:
They are set to 100MB for receive and unlimited for send.
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BosaloskiAuthor Commented:
The exact error is:

The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 5MB
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Rajitha ChimmaniCommented:
What is the current limit on web.config?

Have you tried moving the user mailbox? Appears to be some corruption as web.config settings are universal and should affect every user not just one.
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BosaloskiAuthor Commented:
I was able to resolve the issue myself by going into the advance options of Active Directory and setting the delivercontlength and submissioncontlength to 102400 (100MB) and bouncing the transport service.

Now OWA users can send up to 100MB (highly unlikely they will) as web.config and the exchange mailboxes could already send up to this much.
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BosaloskiAuthor Commented:
I researched and found some information on AD attributes that are used by OWA and exchange.
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