Tip of the Day: How to force the max message size for cloud users
If you are running a hybrid setup and your company policy is forcing max message size of 10mb then how you can force cloud users not to send more than 10mb ?
It’s not just that the cloud users can send more than 15mb emails, they also will have NDRs from the on-prem servers if they send internal communication more than 15mb.
Changing the max send size or receive size is not something you can achieve in the cloud even if you escalated to the product group and the Microsoft support however you can create a transport rule in the office365 portal to drop any emails that has an attachment larger than or equal 15mb
Support Escalation Engineer