update the links

Author: garchiro7

articles/communication-services/tutorials/call-duration.md

@@ -36,9 +36,9 @@ By retrieving the call start time, developers can measure call duration and inte
 ## Prerequisites
 
 - An Azure account with an active subscription. [Create an account for free](https://azure.microsoft.com/free/?WT.mc_id=A261C142F)
-- A deployed Communication Services resource. [Create a Communication Services resource](../../quickstarts/create-communication-resource.md)
-- A user access token to enable the calling client. For more information, see [Create and manage access tokens](../../quickstarts/identity/access-tokens.md).
-- Optional: Complete the quickstart to [add voice calling to your application](../../quickstarts/voice-video-calling/getting-started-with-calling.md)
+- A deployed Communication Services resource. [Create a Communication Services resource](../quickstarts/create-communication-resource.md)
+- A user access token to enable the calling client. For more information, see [Create and manage access tokens](../quickstarts/identity/access-tokens.md).
+- Optional: Complete the quickstart to [add voice calling to your application](../quickstarts/voice-video-calling/getting-started-with-calling.md)
 
 ::: zone pivot="platform-android"
 [!INCLUDE [Manage Call duration events using Android](./includes/call-duration/android.md)]
@@ -54,5 +54,5 @@ By retrieving the call start time, developers can measure call duration and inte
 
 ## Next steps
 
-- [Learn how to manage calls](./manage-calls.md)
-- [Learn about the UI Library](../../concepts/ui-library/ui-library-overview.md)
+- [Learn how to manage calls](../how-tos/calling-sdk/manage-calls.md)
+- [Learn about the UI Library](../concepts/ui-library/ui-library-overview.md)