Add metadata descriptions, part 7

Author: JKirsch1

docs/database-engine/configure-windows/configure-column-encryption-enclave-type.md

@@ -1,5 +1,6 @@
 ---
 title: "Configure the enclave type for Always Encrypted Server Configuration Option | Microsoft Docs"
+description: Find out how to enable or disable a secure enclave for Always Encrypted, and learn how to confirm whether an enclave has been correctly initialized.
 ms.custom: ""
 ms.date: "09/24/2018"
 ms.prod: sql