diff --git a/windows/security/threat-protection/TOC.md b/windows/security/threat-protection/TOC.md
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--- a/windows/security/threat-protection/TOC.md
+++ b/windows/security/threat-protection/TOC.md
@@ -287,6 +287,8 @@
 #### [Configure]()
 ##### [Configure Microsoft Defender ATP for Android features](microsoft-defender-atp/android-configure.md)
 
+#### [Troubleshoot]()
+#### [Troubleshoot sign in issues](microsoft-defender-atp/android-support-signin.md)
 
 
 ### [Configure and manage Microsoft Threat Experts capabilities](microsoft-defender-atp/configure-microsoft-threat-experts.md)
diff --git a/windows/security/threat-protection/microsoft-defender-atp/android-support-signin.md b/windows/security/threat-protection/microsoft-defender-atp/android-support-signin.md
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index 0000000000..c9324d3b96
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@@ -0,0 +1,97 @@
+---
+title: Troubleshoot sign in issues on Microsoft Defender ATP for Android
+ms.reviewer:
+description: Troubleshoot sign in issues for Microsoft Defender ATP for Android
+keywords: microsoft, defender, atp, android, cloud, connectivity, communication
+search.product: eADQiWindows 10XVcnh
+search.appverid: met150
+ms.prod: w10
+ms.mktglfcycl: deploy
+ms.sitesec: library
+ms.pagetype: security
+ms.author: macapara
+author: mjcaparas
+ms.localizationpriority: medium
+manager: dansimp
+audience: ITPro
+ms.collection: M365-security-compliance
+ms.topic: conceptual
+---
+
+# Troubleshooting sign in issues on Microsoft Defender ATP for Android
+
+**Applies to:**
+
+-   [Microsoft Defender Advanced Threat Protection (Microsoft Defender ATP) for
+    Android](https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/microsoft-defender-atp-android)
+
+During onboarding, you might encounter sign in issues after the app is installed on your device. 
+
+This article provides solutions to address the sign on issues.  
+
+## Sign in failed - unexpected error
+**Sign in failed:** *Unexpected error, try later*
+
+![Image of sign in failed error Unexpected error](images/f9c3bad127d636c1f150d79814f35d4c.png)
+
+**Message:**
+
+Unexpected error, try later
+
+**Cause:**
+
+You have an older version of “Microsoft Authenticator” app installed on your
+device.
+
+**Solution:**
+
+Install latest version and of [Microsoft
+Authenticator](https://play.google.com/store/apps/details?androidid=com.azure.authenticator)
+from Google Play Store and try again
+
+## Sign in failed - invalid license
+
+**Sign in failed:** *Invalid license, please contact administrator*
+
+![Image of sign in failed  please contact administrator](images/920e433f440fa1d3d298e6a2a43d4811.png)
+
+**Message:** *Invalid license, please contact administrator*
+
+**Cause:**
+
+You do not have Microsoft 365 license assigned, or your organization does not
+have a license for Microsoft 365 Enterprise subscription.
+
+**Solution:**
+
+Contact your administrator for help.
+
+## Phishing pages and harmful web connections are not blocked on specific OEM devices
+
+**Applies to:** Specific OEMs only
+
+-   **Xiaomi**
+
+Phishing and harmful web connection threats detected by Microsoft Defender ATP
+for Android are not blocked on Xiaomi devices. The following functionality does not work
+on these devices.
+
+![Image of site reported unsafe](images/0c04975c74746a5cdb085e1d9386e713.png)
+
+![Image of connection blocked](images/2f66647cbcefaa4088a5df19d9203afb.png)
+
+**Cause:**
+
+Xiaomi devices introduced a new permission that prevents Microsoft Defender ATP
+for Android app from displaying pop-up windows while running in the background.
+
+Xiaomi devices permission: “Display pop-up windows while running in the
+background.”
+
+![Image of pop up setting](images/6e48e7b29daf50afddcc6c8c7d59fd64.png)
+
+**Solution:**
+
+Enable the required permission on Xiaomi devices.
+
+-   Display pop-up windows while running in the background.
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