As gdodd said, you will need a tool like https://nxlog.co/products/nxlog-community-edition to forward Windows Event Log messages to a syslog server, as Windows Events and syslog (which is used on pretty much anything but Windows) are completely different formats.
Depending on what you want to do, using Logwatch may be sufficient.
The NetXMS agent monitors the Event Log for specific messages. Once such a message is found, the agent triggers a NetXMS Event on the NetXMS server.
Those events can then be processed via NetXMS Event Processing Policies for alerting or actions.
For our use case, Logwatch is all we need (i.e. we're not using nxlog or any other tool like it).
But if you really want/need to forward every log message from a Windows server to a centralised syslog server for storage/processing, you'll have to use a third party tool like the one mentioned.