To create mailboxes in or move mailboxes to an %BRAND_OFFICE_365_SHORT% organization, you must have licenses available. When ...

To create mailboxes in or move mailboxes to an %BRAND_OFFICE_365_SHORT% organization, you must have licenses available. When you sign up for %BRAND_OFFICE_365_SHORT%, you'll receive a specific number of licenses that you can assign to new mailboxes or mailboxes moved from the on-premises organization. Each mailbox in %BRAND_OFFICE_365_SHORT% must have a license. Learn more at Assign or unassign licenses for %BRAND_OFFICE_365_SHORT% for business.