That alert is your AD authentication source rejecting the LDAP query, not RADIUS. TEAP hands the auth source identities a user-only filter chokes on: host/name for machine auth, and the machine account ends in a dollar sign. Check the Input tab in Access Tracker for the exact identity that failed, then the filter on the auth source, and make sure the search base includes Computers.
Also post your version. 6.14 has a confirmed defect where the dollar sign breaks filter escaping, patch pending. If you're on 6.14 and it's the machine identity failing, it's probably the bug, not your filter.
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Dustin Burns
Lead Mobility Engineer @Worldcom Exchange, Inc.
ACCX 1271| ACMX 509| ACSP | ACDA | MVP Guru 2022-2023
If my post was useful accept solution and/or give kudos
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