We had an on-premises Exchange Server 2013 failure with multiple hard disk failures.
Since we already had an Office365 E3 plan, we decided to bite the bullet and move to Exchange Online. Since we did not have ADFS or Dirsync yet and time was against us to get email flowing as quickly as possible, we imported all the users into Office365, i.e. disconnected from our AD.
We then setup all their Outlook 2013 profiles with Office365 and imported their mailboxes from PSTs, so they are all up and running on Office365 now (still disconnected from our AD).
I would like to decommission our on-premises Exchange 2013, since our current setup is not very common, i.e. Office365 mailboxes which are not linked to our AD.
I would like some pointers and guidance how to go about this.
Thanks
Chris