Windows 10: windows server 2019 phone activation issue

In power hell, input slui 4 and get a 9-digit installation ID. The phone number displayed on the page is +852 2904-2198. The call was not answered. The phone number was changed to +852 3002-3256. It was answered by AI. I followed the instructions, but AI kept saying that it didn't understand what I meant. Is there any other way to enable it offline?power hell slui 4 9installation ID +852 2904-2198+852 3002-3256AIAI?

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Office 2019

Only supported on Win10. Sorry, 8.1 users, only 4 years old, gotta go.

Microsoft Office 2019 will only work on Windows 10

https://blogs.technet.microsoft.com...-to-office-and-windows-servicing-and-support/

Spoiler Office 2019
Last year at Ignite, we announced Office 2019 – the next perpetual version of Office that includes apps (including Word, Excel, PowerPoint, and Outlook, and Skype for Business) and servers (including Exchange, SharePoint, and Skype for Business). Today we’re pleased to share the following updates:

• Office 2019 will ship in H2 of 2018. Previews of the new apps and servers will start shipping in the second quarter of 2018.
• Office 2019 apps will be supported on:
  • Any supported Windows 10 SAC release
  • Windows 10 Enterprise LTSC 2018
  • The next LTSC release of Windows Server
• The Office 2019 client apps will be released with Click-to-Run installation technology only. We will not provide MSI as a deployment methodology for Office 2019 clients. We will continue to provide MSI for Office Server products.

 

Unable to activate windows server 2019

I have a new install of Windows Server 2019 that will not allow me to activate windows. I also cannot open any of the UI tools for activation or entering the product key but I get no error message.

The error code I get is 0x80072F8F or sometimes 0x87E10BC6

Things I have tried:

• DISM and sfc check to ensure the image is not corrupted
  
• slui.exe 3
  
• slmgr.vbs /ipk and /ato
  

 

Activate RDS CAL 2019 on Windows Server 2016

Dear Microsoft Support,



We recently purchased Windows Server RDS CAL 2019.

When we tried to install Windows Server RDS CAL 2019 into Windows Server 2016, it shows the license is not recognized and couldn’t install.



My questions are :

1. Can’t Windows RDS CAL 2019 be installed in Windows Server 2016? If can, how?
2. Is there any way to downgrade RDS CAL from 2019 to 2016 version?

Thanks,