diff --git a/windows/deployment/deploy-enterprise-licenses.md b/windows/deployment/deploy-enterprise-licenses.md
index 719e822d59..307d30d1f1 100644
--- a/windows/deployment/deploy-enterprise-licenses.md
+++ b/windows/deployment/deploy-enterprise-licenses.md
@@ -255,3 +255,10 @@ At a command prompt, type: **winver**
 A popup window will display the Windows 10 version number and detailed OS build information.
 
 If a device is running a version of Windows 10 Pro prior to version 1703 (for example, version 1511), it will not be upgraded to Windows 10 Enterprise when a user signs in, even if the user has been assigned a subscription in the CSP portal.
+
+### Delay in the activation of Enterprise License of Windows 10 
+
+This is by design. Windows 10 has a built-in cache to help with the volume of calls coming to determine the upgrades of Windows 10 devices.  
+
+This cache stores three-day values, including responses that indicate that the device is not eligible for an upgrade. When a device makes the call to check for upgrade eligibility on behalf of the signed user with a qualifying license, it can take three days + the delay for the subscription purchase to go through OMS into the system that masters Windows10 licenses.
+