Learn more about service plans in this article. Microsoft 365 Apps is the most secure version of Microsoft 365. The Microsoft 365 and Office 365 plans combine the familiar Microsoft 365 desktop suite of premium apps with cloud-based versions of Microsoft's next-generation communications and collaboration services-including Microsoft Exchange Online, Microsoft SharePoint Online, Office Mobile, Office for the web, and Microsoft Teams-to help users be productive from virtually anywhere. Office LTSC is a one-time release version of Microsoft 365 apps, as with previous perpetual releases. However, for customers who can’t move all their devices to the cloud just yet due to inability to take regular updates, or have fully disconnected and secure environments, Office LTSC is available. The following volume licensed Office products are available for devices running Windows: These Office products use Click-to-Run, instead of Windows Installer (MSI), as the installation technology. Microsoft 365 Apps for enterprise, the cloud-connected version of Microsoft 365, delivers the most productive and most secure Microsoft 365 experience-with the lowest total cost of ownership for deployment and management. Office LTSC 2021 is available for enterprise admins to download and deploy to the users in their organization.

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