removed ref to Server 2008 R2

Author: MGoedtel

articles/automation/troubleshoot/update-agent-issues.md

@@ -4,7 +4,7 @@ description: Learn how to troubleshoot and resolve issues with the Azure Automat
 services: automation
 author: mgoedtel
 ms.author: magoedte
-ms.date: 12/03/2019
+ms.date: 01/16/2020
 ms.topic: conceptual
 ms.service: automation
 ms.subservice: update-management
@@ -49,8 +49,7 @@ The operating system check verifies whether the Hybrid Runbook Worker is running
 
 |Operating system  |Notes  |
 |---------|---------|
-|Windows Server 2008 R2 RTM, Windows Server 2008 | Supports only update assessments.         |
-|Windows Server 2008 R2 SP1 and later |.NET Framework 4.6 or later is required. ([Download the .NET Framework](/dotnet/framework/install/guide-for-developers))<br/> Windows PowerShell 5.1 is required.  ([Download Windows Management Framework 5.1](https://www.microsoft.com/download/details.aspx?id=54616))        |
+|Windows Server 2012 and later |.NET Framework 4.6 or later is required. ([Download the .NET Framework](/dotnet/framework/install/guide-for-developers))<br/> Windows PowerShell 5.1 is required.  ([Download Windows Management Framework 5.1](https://www.microsoft.com/download/details.aspx?id=54616))        |
 
 ### .NET 4.6.2
 
@@ -111,7 +110,7 @@ RuleId                      : OperatingSystemCheck
 RuleGroupId                 : prerequisites
 RuleName                    : Operating System
 RuleGroupName               : Prerequisite Checks
-RuleDescription             : The Windows Operating system must be version 6.1.7601 (Windows Server 2008 R2 SP1) or higher
+RuleDescription             : The Windows Operating system must be version 6.2.9200 (Windows Server 2012) or higher
 CheckResult                 : Passed
 CheckResultMessage          : Operating System version is supported
 CheckResultMessageId        : OperatingSystemCheck.Passed