M365 Business Premium increases by $2, from $20 to $22. Office 365 (O365) E1 increases $2, from $8 to $10. O365 E3 increases by $3, from $20 to $23. O365 E5 increases $3, from $35 to $38.

E3, E5, and the mythical E7 bundle The 365 package is sold to business customers primarily in bundles called E3 and E5, where the E stands for "enterprise." E3 is a more basic offering ...

Starting in August, Microsoft will expand this discount to its Office 365 E1, E3 and E4 subscriptions, Johnson said. These plans are priced at $8, $20 and $22 per user per month respectively.