Imaginet successfully migrated a national museum’s high availability, on-premises email environment to Microsoft Office 365 Exchange Online, modernizing their email services from a Microsoft Exchange 2013 hybrid, on-premises environment. Imaginet enabled hybrid mode on the client’s Exchange Server and connected to Exchange Online, and migrated over 700 mailboxes and moved resources and shared mailboxes. Imaginet proposed security recommendations, set up Microsoft Defender for Office 365, constructed a decommissioning plan, and executed an update for Office 365 and Exchange 2019 hybrid. The project scope increased, but Imaginet stayed close to the original budget and delivered additional value by minimizing costs and providing hands-on Exchange Online administration and Azure Active Directory (AD) MFA training.