|exchange online license price||0.16||0.4||3752||27|
Based on your assumptions, yes. You can pre-assign Exchange Online licenses to users with on-premises mailboxes any time before you migrate them. You'll get a warning message that the user hasn't been migrated yet when you do so. The mailbox will be provisioned at the time of migration.What is the definition of Exchange Online?
Exchange Online is the hosted version of Microsoft's messaging platform, Exchange Server. Introduced as part of the Exchange Server 2010 release, Exchange Online gives companies a majority of the same benefits that on-premises Exchange deployments provide.