One of our clients had faced an issue suddenly after they have just updated their Windows Server from 2016 to 2019 and on that server, KMS was installed and was working perfectly fine before updating Sever to 2019. Have you ever face this type of issue in your KMS server? or might be this article will help you in the future for resolving such type of issue NOTE: If you have a firewall, make sure port 1688 is open to allow the KMS host service through the firewall. Office 2016: At least Windows Server 2008 R2 or at least Windows 7 Service Pack 1 (volume editions).Office 2019: At least Windows Server 2012 or at least Windows 8.1 (volume editions).Office supports KMS host computers running on the following operating systems, depending on which version of Office is being activated by KMS: Then, you need to activate the KMS key over the internet or by telephone. To enable the KMS host computer to activate Office, you must install the Office Volume License Pack and enter your KMS key on the KMS host computer. You can configure a Windows Server computer to be a KMS host computer by installing the Volume Activation Services role and then running the Volume Activation Tools wizard.
To activate volume licensed versions of Office, including Project and Visio, you must have a Key Management Service (KMS) host computer.
