WinSyslog Event ID 900: Invalid license key rejected#

Answer#

The WinSyslog service does not start with the rejected key.

Event details#

Event ID: 900
Severity: Error
Component: Licensing
Windows Event Log source: AdisconWinSyslog
Available since: Current supported versions; original introduction not recorded
Message pattern: WinSyslog rejected an invalid license key during startup. Additional detail: {event_detail}

Possible causes#

The configured object is missing, invalid, unsupported by this product, or unavailable at runtime.
Windows or a required provider returned the operation-specific error appended to the event.

Immediate checks#

Identify the exact service, rule, filter, action, or setting named by the complete event detail.
Compare that object with the product reference and preserve the first related error in the same time window.
Correct only the identified setting or dependency, then run one controlled test.

Detailed procedures#

Verify product license and feature entitlement state — Confirm product, version, validity, edition, and required feature without exposing license data.
Collect an Event ID and neighboring product events — Preserve the complete event and the product events immediately before and after it.
Export configuration and collect a bounded debug log — Create a text configuration export and time-bounded debug capture, then disable debugging.

Verify the result#

Repeat or monitor the affected operation and confirm that Event ID 900 does not recur and that licensing processing continues.

Evidence to collect#

The complete Windows Application Event Log entry, including all event detail.
The product name, exact version, service account, and event timestamp with time zone.
A configuration export and debug log covering the same time window, with secrets removed.

Escalation#

If the event continues after the detailed procedures, collect the listed evidence and contact Adiscon Support.