Events/builds not showing in audit log.
I am trying to track down an issue with builds, and need to identify who is triggering them, however, there's no log of several of these builds appearing in the audit log.
Example of several failed builds:

However, If I go to audit log, none of these failed builds show as even being triggered.
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TeamCity logs user actions into the Audit Log. However, if a user does not manually trigger a build — for example, if it is triggered by a schedule, VCS trigger — it may not appear in the Audit Log.
To investigate who or what triggered a build, you can:
- Click on one of the failed builds (e.g., Build #128, #133, #143, #132).
- On the Build Overview page, check the “Triggered By” section for detailed information.
Regarding the issue with the env.DEPLOY_TARGET:
The builds are expecting the DEPLOY_TARGET environment variable to be set. However, it appears that DEPLOY_TARGET is missing, causing the build step to fail at runtime.
If the build is triggered manually, the user might set or provide this parameter.
If the build is triggered automatically (e.g., by a schedule, VCS event, or API) and the required parameters are not injected, the build will fail due to the missing variable.
If you want to do further investigation, please kindly provide the teamcity-server.log(https://www.jetbrains.com/help/teamcity/teamcity-server-logs.html) corresponding to the time when the error occurred. Files can be uploaded via https://uploads.jetbrains.com/. Please let us know the exact id after the upload.
Best Regards,
Tom