diff --git a/docs/configuration-migration-v2.md b/docs/configuration-migration-v2.md
index d7e4964c..db40b66c 100644
--- a/docs/configuration-migration-v2.md
+++ b/docs/configuration-migration-v2.md
@@ -27,8 +27,11 @@ This guide helps you migrate from the old configuration variables to the new con
 |----------|----------|--------|
 | `VECTOR_SYNC_ENABLED` | `ENABLE_SEMANTIC_SEARCH` | Deprecated |
 | `ENABLE_OFFLINE_ACCESS` | `ENABLE_BACKGROUND_OPERATIONS` | Deprecated |
+| `ENABLE_TOKEN_EXCHANGE` | `MCP_DEPLOYMENT_MODE=login_flow` | Removed (now ignored) |
 | N/A (auto-detected) | `MCP_DEPLOYMENT_MODE` | New (optional) |
 
+> **`ENABLE_TOKEN_EXCHANGE` was removed.** The OAuth token-exchange mode was never fully implemented and was retired in the ADR-022/ADR-023 consolidation. The variable is now silently ignored — use `MCP_DEPLOYMENT_MODE=login_flow` for multi-user OAuth.
+
 **Tuning parameters unchanged:**
 - `VECTOR_SYNC_SCAN_INTERVAL` - Keep as-is
 - `VECTOR_SYNC_PROCESSOR_WORKERS` - Keep as-is
diff --git a/settings.toml.example b/settings.toml.example
index 84f5f6db..a3e1835f 100644
--- a/settings.toml.example
+++ b/settings.toml.example
@@ -48,7 +48,6 @@ enable_background_operations = false
 # Deprecated aliases (declared so env var overrides work)
 vector_sync_enabled = false
 enable_offline_access = false
-enable_token_exchange = false
 
 # --- Token storage ---
 token_encryption_key = "@none"