added note to 2-4 tutorials about provisioning

Author: KingdomOfEnds

articles/digital-twins/tutorial-facilities-analyze.md

@@ -34,6 +34,9 @@ This tutorial assumes that you have [configured](tutorial-facilities-setup.md) a
 - The [Digital Twins C# samples](https://github.com/Azure-Samples/digital-twins-samples-csharp) downloaded and extracted on your work machine.
 - [.NET Core SDK version 2.1.403 or later](https://www.microsoft.com/net/download) on your development machine to run the sample. Run `dotnet --version` to verify that the right version is installed.
 
+> [!TIP]
+> Use a unique Digital Twins instance name if you're provisioning a new instance.
+
 ## Stream data by using Event Hubs
 
 You can use the [Event Hubs](../event-hubs/event-hubs-about.md) service to create a pipeline to stream your data. This section shows you how to create your event hub as the connector between your Azure Digital Twins and Time Series Insights instances.

articles/digital-twins/tutorial-facilities-events.md

@@ -35,6 +35,9 @@ This tutorial assumes that you have [configured](tutorial-facilities-setup.md) a
 - [.NET Core SDK version 2.1.403 or later](https://www.microsoft.com/net/download) on your development machine to run the sample. Run `dotnet --version` to verify that the right version is installed.
 - An Office 365 account to send notification e-mails.
 
+> [!TIP]
+> Use a unique Digital Twins instance name if you're provisioning a new instance.
+
 ## Integrate events with Event Grid
 
 In this section, you set up [Event Grid](../event-grid/overview.md) to collect events from your Azure Digital Twins instance, and redirect them to an [event handler](../event-grid/event-handlers.md) such as Logic Apps.

articles/digital-twins/tutorial-facilities-udf.md

@@ -33,6 +33,9 @@ This tutorial assumes that you have [finished your Azure Digital Twins setup](tu
 - [.NET Core SDK version 2.1.403 or later](https://www.microsoft.com/net/download) on your development machine to build and run the sample. Run `dotnet --version` to verify that the right version is installed. 
 - [Visual Studio Code](https://code.visualstudio.com/) to explore the sample code. 
 
+> [!TIP]
+> Use a unique Digital Twins instance name if you're provisioning a new instance.
+
 ## Define conditions to monitor
 
 You can define a set of specific conditions to monitor in the device or sensor data, called *matchers*. You can then define functions called *user-defined functions*. User-defined functions execute custom logic on data that comes from your spaces and devices, when the conditions specified by the matchers occur. For more information, read [Data processing and user-defined functions](concepts-user-defined-functions.md).