A couple of weeks ago, Microsoft announced with a new service bundle called Microsoft 365. Until recently there was some confusion as to what actual products and features was included in it..
I found this great explanation by Aaron Dinnage which explains many details in his blog post: Unpacking Microsoft 365
Here is my summary of his blog post:
Microsoft 365 comes in two bundle (Business or Enterprise):
Enterprise Version comes in two flavors (E3 & E5):
The difference between E3 & E5 in the Windows, EM&S and Office 365 product suites follows:
Again – PLEASE do not thank me — I just summarized the research by Aaron Dinnage which explains many details in his blog post: Unpacking Microsoft 365 Thank you Aaron!
I hope this helps as much as it has helped me!