Removed 1KB key size change, for now.

Author: rezasherafat

articles/iot-hub/iot-hub-devguide-device-twins.md

@@ -240,7 +240,7 @@ The [Azure IoT device SDKs](iot-hub-devguide-sdks.md) make it easy to use the pr
 
 Tags, desired properties, and reported properties are JSON objects with the following restrictions:
 
-* All keys in JSON objects are UTF-8 encoded, case-sensitive, and up-to 1KB in length. Allowed characters exclude UNICODE control characters (segments C0 and C1), and `.`, `$`, and SP.
+* All keys in JSON objects are UTF-8 encoded, case-sensitive, and up-to 64 bytes in length. Allowed characters exclude UNICODE control characters (segments C0 and C1), and `.`, `$`, and SP.
 
 * All values in JSON objects can be of the following JSON types: boolean, number, string, object. Arrays are not allowed. The maximum value for integers is 4503599627370495 and the minimum value for integers is -4503599627370496.
 

includes/iot-hub-limits.md

@@ -35,7 +35,7 @@ The following table lists the limits that apply to IoT Hub resources.
 | Maximum delivery count for feedback messages <br/> in response to a cloud-to-device message |100 |
 | Maximum TTL for feedback messages in <br/> response to a cloud-to-device message |2 days |
 | [Maximum size of device twin](../articles/iot-hub/iot-hub-devguide-device-twins.md#device-twin-size) <br/> (tags, reported properties, and desired properties) | 8 KB |
-| Maximum length of device twin string key | 1 KB |
+| Maximum length of device twin string key | 64 bytes |
 | Maximum length of device twin string value | 4 KB |
 | [Maximum depth of object in device twin](../articles/iot-hub/iot-hub-devguide-device-twins.md#tags-and-properties-format) | 10 |
 | Maximum size of direct method payload | 128 KB |