Since you have to register with Microsoft for this product, you can also add a credit card to your account. This way, you can continue to pay by card after the product has expired.
No, Microsoft Teams is not included in this subscription. The applications included are Excel, OneNote, Outlook and PowerPoint. You can use Teams for free with a Microsoft account, but with the subscription you get extended functions such as group calls for up to 30 hours.
Well, if you take the time, it's cheaper to buy a new one every year than to renew it.
But you'll have to make the change on every computer you own/use
Officially this is the case, yes (whether it is technically possible for two device licences to be used by two people at the same time, I don't know). For several people (up to 5) you would need this version: Microsoft Office 365 Home (German, Windows, Mac OS X)
Yes, there is probably a "Schlitzöhrli" at work. Why not 20 accounts? All the people you know could still join in!
Well, the Office can be installed on up to 5 devices but only 1 (one) user.
Kind regards
Magnus Z'Rotz
You can activate it on 5 pcs / laptops at the same time. On the Microsoft website you can manage all devices and, for example, deactivate a device if you no longer need Office on that device.
Personal:
Simultaneous use of 1 PC/Mac, 1 tablet and 1 smartphone.
Home:
Simultaneous use for up to 4 users (specifically: family members) on the correspondingly named devices, so quasi 4x Personal bundled in one subscription.
Yes, this license only last only for one year. However, there is a student version you can buy forever. You can change the language as soon as you bought your Microsoft Office in the settings.