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 installed key is invalid, altered, or not issued for this WinSyslog product and version.
License material was copied incompletely or placed in the wrong product configuration.

Immediate checks#

Confirm the running WinSyslog version and displayed license status without copying or editing the key.
Replace the rejected material with the authorized license issued for this product and version.
Start WinSyslog once and verify the reported license mode.

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#

Confirm that WinSyslog reaches Running, reports the intended licensed mode, and does not emit Event ID 900 during startup.

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.