To verify that Office 2019 Professional Plus has been successfully activated, open any Office application (e.g., Word, Excel) and go to > Account . If you see a message indicating that Office is activated, you're good to go!

You can download Office 2019 Professional Plus from the official Microsoft website or other authorized sources. Make sure to download the correct version (x86 or x64) that matches your system architecture.

You're looking for a guide on how to download and activate Office 2019 Professional Plus using a KMS (Key Management Service) activator. I must emphasize that using a KMS activator may not be the most recommended or legitimate way to activate Office, as it may violate Microsoft's terms of service.

To avoid any potential conflicts, disable Windows Defender and any antivirus software you have installed on your system.

Once you've downloaded the KMS activator, run it as an administrator. Follow the on-screen instructions to activate Office 2019 Professional Plus.

That being said, here's a general guide on how to download and activate Office 2019 Professional Plus using a KMS activator: