Step1. Open Exchange Admin Center
Step2. Click on Recipients-> Mailboxes
Step3. Click on mail flow settings 
Step4. Click on Message size restrictions
Step5. Change inbound size limit
Step6. Change outbound size limit
How to change inbound and outbound message size limit for all users. Print
Created by: Ravi Kumar Sharma
Modified on: Mon, 27 Jan, 2025 at 11:58 AM
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