- Your on-premises Exchange organization includes mailboxes that are hosted in Microsoft Exchange Server 2003.
- Your on-premises Exchange organization is set up for a hybrid deployment together with Microsoft Exchange Online.
- You move user mailboxes or shared mailboxes from on-premises Exchange Server 2003 to Exchange Online.
You can download this command-line tool from the following website:
Article ID: 2938786 - Last Review: 28 Dec 2016 - Revision: 1