[RKDinOKC]

The horror is moving from a in-house system to the 365 stuff. Domain part of logins change, where to login changes, and password rules are different. And our company Active Directory forest is company.org not company.com, but our email is @company.com. 365 doesn't like that.

One of the things I noticed as weird. All the documentation I've seen says when migrating from any older version of Exchange on-site, to setup a 2013 Exchange server to handle email distribution and migration during the process. Our consultants have installed a 2010 exchange server, then all kinds of patches and programs for the tools that are already in 2013 to handle the migration and distribution. hmmmm.