The organization that I work for has about 2400 employees who we will want to allow access to a site collection. However, only about 150 of those will have Office 365 licenses.
We would like to set this up using our AD Security Groups, but not sure if this is possible considering each non-licensed user would have to create some sort of microsoft account to login.
Has anyone dealt with a situation similar to this with a large organization, and how did you automate the process to add and remove users as needed.