Office 365 users are restricted to a 10MB attachment Limit RRS feed

  • Question

  • Hi Team,

    We currently have a hybrid setup of Exchange 2013 and Office 365. 

    Our 365 users are unable to receive attachments larger than 10MB. I have looked everywhere and assume the issue lies within the transportconfig setting our ExternalDsnMaxMessageAttachSize and InternalDsnMaxMessageAttachSize at 10MB

    In our On prem exchange I can change these values, however in 365 it appears as though they have deprecated the commands to change these values.

    Does anyone know how I can remedy this situation?


    Thursday, December 17, 2020 11:56 PM

All replies

  • Hi,

    Please note that, this Exchange Server Development forum mainly focuses on scripting issues, And the previous TechNet Exchange forum has been migrated to Q&A forum, please post your issues there if you need further support.

    We have created a copy of your question on Microsoft Q&A Platform: Office 365 users are restricted to a 10MB attachment Limit. Kindly register the Microsoft Q&A Platform and continue the discussion out there with us.


    Joyce Shen

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

    Friday, December 18, 2020 2:56 AM