Accessing, sharing, and managing documents and media within Microsoft Teams Free
Hello Kratochvil David,
You do need a Microsoft account to use Teams, but you can create it using your existing email address. You do not need to create a new Outlook.com or Hotmail address.
The failed verification may have triggered a temporary registration block. Stop retrying for now, then try again later using:
- A phone or another device
- Mobile data or another network
- No VPN, proxy, ad blocker, or privacy extension
Microsoft recommends trying another device or sign-up method when account creation fails: How to create a new Microsoft account
Enter your existing email address during registration. Microsoft will send a verification message to that address. Your Windows OEM licence is unrelated to this registration issue.