diff --git a/windows/security/threat-protection/microsoft-defender-atp/linux-install-manually.md b/windows/security/threat-protection/microsoft-defender-atp/linux-install-manually.md
index 931ca5edf7..d78e94da0e 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/linux-install-manually.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/linux-install-manually.md
@@ -241,6 +241,9 @@ Download the onboarding package from Microsoft Defender Security Center:
     1
     ```
 
+    > [!IMPORTANT]
+    > When the product starts for the first time, it downloads the latest antimalware definitions. Depending on your Internet connection, this can take up to a few minutes. During this time the above command returns a value of `0`.
+
 5. Run a detection test to verify that the machine is properly onboarded and reporting to the service. Perform the following steps on the newly onboarded machine:
 
     - Ensure that real-time protection is enabled (denoted by a result of `1` from running the following command):
diff --git a/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-ansible.md b/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-ansible.md
index 8eae3591a3..6dca87169e 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-ansible.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-ansible.md
@@ -42,7 +42,7 @@ Before you get started, please see [the main Microsoft Defender ATP for Linux pa
   - Curl
   - Unzip
 
-- All host must be listed in the following format in the `/etc/ansible/hosts` file:
+- All hosts must be listed in the following format in the `/etc/ansible/hosts` file:
     
     ```bash
     [servers]
@@ -233,6 +233,9 @@ Now run the tasks files under `/etc/ansible/playbooks/`.
     $ ansible-playbook /etc/ansible/playbooks/install_mdatp.yml -i /etc/ansible/hosts
     ```
 
+> [!IMPORTANT]
+> When the product starts for the first time, it downloads the latest antimalware definitions. Depending on your Internet connection, this can take up to a few minutes.
+
 - Validation/configuration:
 
     ```bash
diff --git a/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-puppet.md b/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-puppet.md
index a27c84b264..2e2db11bae 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-puppet.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/linux-install-with-puppet.md
@@ -167,6 +167,9 @@ $ mdatp --health healthy
 
 The above command prints `1` if the product is onboarded and functioning as expected.
 
+> [!IMPORTANT]
+> When the product starts for the first time, it downloads the latest antimalware definitions. Depending on your Internet connection, this can take up to a few minutes. During this time the above command returns a value of `0`.
+
 If the product is not healthy, the exit code (which can be checked through `echo $?`) indicates the problem:
 
 - 1 if the device is not yet onboarded.
diff --git a/windows/security/threat-protection/microsoft-defender-atp/microsoft-defender-atp-linux.md b/windows/security/threat-protection/microsoft-defender-atp/microsoft-defender-atp-linux.md
index 36e0aff59f..ad38c483b0 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/microsoft-defender-atp-linux.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/microsoft-defender-atp-linux.md
@@ -20,6 +20,15 @@ ms.topic: conceptual
 
 # Microsoft Defender ATP for Linux
 
+> [!IMPORTANT]
+> **PUBLIC PREVIEW EDITION**
+> 
+> This documentation is for a pre-release solution. The guidelines and the solution are subject to change between now and its general availability.
+> 
+> As with any pre-release solution, remember to exercise caution when determining the target population for your deployments.
+> 
+> If you have preview features turned on in the Microsoft Defender Security Center, you should be able to access the Linux onboarding page immediately. If you have not yet opted into previews, we encourage you to [turn on preview features](https://docs.microsoft.com/windows/security/threat-protection/microsoft-defender-atp/preview) in the Microsoft Defender Security Center today.
+
 This topic describes how to install, configure, update, and use Microsoft Defender Advanced Threat Protection (Microsoft Defender ATP) for Linux.
 
 > [!VIDEO https://www.microsoft.com/en-us/videoplayer/embed/RE4q3yP]