Hi @newsplunker1, Palo Alto TA uses sourcetype renaming. You should apply your transform to original sourcetype which is pan:log or pan_log. But as @gcusellowarned, above setting will filter everything in that case. Your regex must be specific. Please try below; props.conf
[pan:log]
TRANSFORMS-filter_pan_userid = filter_pan_user_id
transforms.conf
[filter_pan_user_id]
REGEX = ^[^,]+,[^,]+,[^,]+,USERID,
DEST_KEY = queue
FORMAT = nullQueue
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