You can use the %BRAND_OFFICE_365_SHORT% Mailbox wizard on an %BRAND_EXCHANGE_ONLINE_SHORT% server to create user mailboxes ...

You can use the %BRAND_OFFICE_365_SHORT% Mailbox wizard on an %BRAND_EXCHANGE_ONLINE_SHORT% server to create user mailboxes in your %BRAND_OFFICE_365_SHORT% organization. If you want to create remote mailboxes, you'll have to use this wizard for each remote mailbox. You can't use the wizard to create multiple remote mailboxes.