add phased approach

windows/security/threat-protection/TOC.md

@@ -21,9 +21,9 @@
 ### [Phase 2: Set up](microsoft-defender-atp/production-deployment.md)
 ### [Phase 3: Onboard]()
 #### [Onboarding overview](microsoft-defender-atp/onboarding.md)
-##### [Onboarding using Microsoft Endpoint Configuration Manager](microsoft-defender-atp/onboarding-endpoint-configuration-manager.md)
+#### [Onboarding using Microsoft Endpoint Configuration Manager](microsoft-defender-atp/onboarding-endpoint-configuration-manager.md)
-##### [Onboarding using Microsoft Endpoint Manager](microsoft-defender-atp/onboarding-endpoint-manager.md)
+#### [Onboarding using Microsoft Endpoint Manager](microsoft-defender-atp/onboarding-endpoint-manager.md)
-
+#### [Onboard supported devices](microsoft-defender-atp/onboard-configure.md)
 
 ## [Migration guides](microsoft-defender-atp/migration-guides.md)
 ### [Switch from McAfee to Microsoft Defender for Endpoint]()

windows/security/threat-protection/microsoft-defender-atp/deployment-phases.md

@@ -29,7 +29,7 @@ ms.topic: article
 
 There are three phases in deploying Microsoft Defender ATP:
 
-|Phase | Desription | 
+|Phase | Description | 
 |:-------|:-----|
 | ![Phase 1: Prepare](images/prepare.png)<br>[Phase 1: Prepare](prepare-deployment.md)| Learn about what you need to consider when deploying Microsoft Defender ATP: <br><br>- Stakeholders and sign-off <br> - Environment considerations <br>- Access <br> - Adoption order
 |  ![Phase 2: Setup](images/setup.png) <br>[Phase 2: Setup](production-deployment.md)|  Take the initial steps to access Microsoft Defender Security Center. You'll be guided on:<br><br>- Validating the licensing <br>  - Completing the setup wizard within the portal<br>- Network configuration|
@@ -46,7 +46,7 @@ The [Plan deployment](deployment-strategy.md) topic provides high-level informat
 
 Check out the [PDF](https://github.com/MicrosoftDocs/windows-itpro-docs/raw/public/windows/security/threat-protection/microsoft-defender-atp/downloads/mdatp-deployment-strategy.pdf)  or  [Visio](https://github.com/MicrosoftDocs/windows-itpro-docs/raw/public/windows/security/threat-protection/microsoft-defender-atp/downloads/mdatp-deployment-strategy.vsdx) to see the various paths in deploying Microsoft Defender ATP. 
 
-[![Screenshot of the the various deployment paths](images/mdatp-deployment-strategy.png) ](images/deployment-strategy-big.png#lightbox)
+[![Image of the PDF showing the various deployment paths](images/mdatp-deployment-strategy.png) ](images/deployment-strategy-big.png#lightbox)
 
 
 ## In Scope

windows/security/threat-protection/microsoft-defender-atp/deployment-strategy.md

@@ -45,6 +45,23 @@ Depending on your environment, some tools are better suited for certain architec
 |:-----|:-----|
 |[![Thumb image for Microsoft Defender ATP deployment strategy](images/mdatp-deployment-strategy.png)](https://github.com/MicrosoftDocs/windows-itpro-docs/raw/public/windows/security/threat-protection/microsoft-defender-atp/downloads/mdatp-deployment-strategy.pdf)<br/> [PDF](https://github.com/MicrosoftDocs/windows-itpro-docs/raw/public/windows/security/threat-protection/microsoft-defender-atp/downloads/mdatp-deployment-strategy.pdf)  \| [Visio](https://github.com/MicrosoftDocs/windows-itpro-docs/raw/public/windows/security/threat-protection/microsoft-defender-atp/downloads/mdatp-deployment-strategy.vsdx) | The architectural material helps you plan your deployment for the following architectures: <ul><li> Cloud-native </li><li> Co-management </li><li> On-premise</li><li>Evaluation and local onboarding</li>
 
+
+## Phased deployment approach
+Regardless of the deployment strategy you decide to implement, deploying Microsoft Defender ATP can be done in a phased approach. 
+
+Enterprises can deploy the service on a pilot collection, and then incrementally roll the service out to a larger set of devices.
+
+Adopting a phased approach helps reduce potential issues or conflicts that could arise while rolling the service out.
+
+|**Pilot and deployment phases**|**Description**|
+|:-----|:-----|
+Pilot and deployment planning | Phase 1: Identify 50 systems for pilot testing - Focus on the security team, IT team and maybe Helpdesk
+Full scale pilot | Phase 2: 100  systems <br> 	Phase 3: 150 systems <br> Phase 4: 500 systems <br> Phase 5: 1000 systems <br><br> Review and assess if there required tweaks to deployment. 
+Full deployment | Roll out service to the rest of environment in larger increments.
+
+
+
+
   
 ## Related topics
 - [Deployment phases](deployment-phases.md)