Microsoft 365 Family

Microsoft Office 2019 is a perpetual license, it only includes desktop applications (Word, Excel, Powe PointPoint, Outlook, OneNote) and does not include online services. It is licensed for a workstation (1 workstation, PC or Mac). Microsoft 365 depending on the version selected, also includes on-line services, such as Microsoft Exchange e-mail, Teams messaging, SharePoint, virtual OneDrive and online versions of traditional applications from the Office suite. The Microsoft 365 subscription is limited in time (one month or one year) and must be renewed. The license allows the application to be used by only 1 user, on 5 workstations (PC or MAC), 5 smartphones and 5 tablets.

Internet access is required to install and activate the latest versions of the apps and services included in all Microsoft 365 subscription plans. Remember that if you are already a subscriber, you don't need to reinstall or buy another subscription.
For Microsoft 365 plans, it is also needed to manage your subscription account, for example to install Office applications on other computers or to change billing options. Internet access is also required to use documents saved in the OneDrive storage space, unless you install the OneDrive desktop app.
You also need to connect to the internet regularly to keep Microsoft 365 up to date and benefit from automatic upgrades. If you don't connect to the internet within 31 days, your apps will go into reduced functionality mode, which means you can view and print documents, but you can't edit them or create new ones. To reactivate the applications, all you need to do is connect to the Internet.
You don't need to stay connected to the internet to use your desktop Office applications such as Word, Excel and PowerPoint as they are installed on your computer.

It's just that the subscribed Office 365 service will automatically rename it to Microsoft 365. For the same price, you get access to your favorite features in Office 365 and additional benefits as they become available. You don't need to take any action. The changes will take effect on April 21, 2020.

You must create a Microsoft account at https://www.office.com/setup. It is necessary to assign your license to it with a key and then download the Microsoft Office installation files.

The license in the ESD model (Electronic Software Distribution) is delivered electronically - i.e. by e-mail - in the form of a key that is assigned to the Microsoft Account before downloading the installation files.
Another delivery model for Microsoft 365 Family is the BOX version, in which the key is printed on a card and delivered in a box that is sent by courier.

If you have an earlier version of Microsoft Office, uninstall it before installing Microsoft 365 Family.

Microsoft 365 is a performance cloud designed to help everyone achieve what's important in work and life with best-in-class Office applications, intelligent cloud services, and advanced security.

The confirmation of the legality of Microsoft 365 is the VAT invoice issued by official Microsoft Partner and the entry on the Microsoft account.

Before installing the Microsoft 365 package, you will be asked to choose the language version from among all Microsoft 365 versions. Additionally, the language of the package can be changed after installation, while using the Microsoft 365 application.

Yes, Publisher and Access are available in Microsoft 365 Family and Microsoft 365 Business.