Microsoft introduce a new tenant-level outbound email limit based on the number of email licences that a tenant has. There’s a table showing sample limits with various licence counts, or you can work it out yourself using the provided formula – have you ever calculated anything to the power of 0.7? Now’s your chance!

Enforcement starts from 3 April, 2025 and you can find all the pertinent details with a useful FAQ in the lengthy announcement article here: https://bit.ly/4ijbhYm.