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Exchange 2016 Limit Attachment download in Mobile?

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Hi everyone,

I want to limit user mobile email from downloading attachment large than 10MB.

I checked in web.config file in sync folder,below are the default configuration:-

"MaxDocumentDataSize" value="10240000"

maxRequestLength="10240"

However, when i send email attachment from internal outlook to user mobile mailbox, they are still able to download and open attachment that are large than 10MB?

Please advise.

Thanks.

Thursday, November 14, 2019 12:36 PM

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Refer,

https://docs.microsoft.com/en-us/exchange/mail-flow/message-size-limits?view=exchserver-2019

https://docs.microsoft.com/en-us/exchange/configure-client-specific-message-size-limits-exchange-2013-help?redirectedfrom=MSDN

Thursday, November 14, 2019 1:32 PM

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Hi min777,

It’s recommended to use the following commands to limit the size attachment for mobile device.

New-MobileDeviceMailboxPolicy -Name ‘name’ -IsDefault $true -MaxAttachmentSize 10mb

For more detailed information, refer to https://docs.microsoft.com/en-us/powershell/module/exchange/devices/new-mobiledevicemailboxpolicy?view=exchange-ps

Regards,

Eric Yin

Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.
- Proposed as answer by Eric_YinMicrosoft contingent staff Monday, November 18, 2019 9:37 AM
Friday, November 15, 2019 11:29 AM

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Hi,

I am writing here to confirm with you how the thing going now?

If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.

Just checking in to see if above information was helpful. Please let us know if you would like further assistance.

Regards,

Eric Yin

Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

Wednesday, November 20, 2019 10:12 AM

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Hi Eric_Yin,

I have set the command as per recommended, however when i test send an attachment more than 10MB, I'm still able to receive the attachment and download view it via mobile outlook apps.

Between, the sender and recipient is both internal user.

any idea?

thanks.
- Edited by min777 Wednesday, November 20, 2019 11:33 AM
Wednesday, November 20, 2019 11:17 AM

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Hi min777,
Check if the mailboxes assigned with the default mobile device policy.

Regards,

Eric Yin

Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

Friday, November 22, 2019 11:03 AM

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Hi, I'm here to confirm with you if your issue has been resolved. If the problem is successfully solved, you can share your solution and mark them or the helpful reply as answer, this will make answer searching in the forum easier and be beneficial to other community members as well.

Regards,

Eric Yin

Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

Wednesday, November 27, 2019 10:32 AM

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