KeyVault.createKey() accepts an additional overload, KeyVault.createKey(kms, options) (not the same as KeyVault.createKey(kms, masterKey)). Options has the properties: masterKey keyAltNames keyMaterial ClientEncryption.encrypt() has an additional overload, ClientEncryption.encrypt(keyId, value, options). The options object has the same properties as the corresponding driver method, notably, it includes queryType, contentionFactor and indexKeyId that are passed through to the driver.