Unable to install Task Server Service after applying Microsoft updates from June 13th 2017

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Article ID: 169801

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Updated On:

Products

Management Platform (Formerly known as Notification Server) Task Server

Issue/Introduction

After applying the Microsoft updates from June 13th 2017, Task Server Service cannot be installed on potential Site Servers.

No errors, but the option to select the Task Server service will be grayed out.

Cause

The June 13th Updates from Microsoft include an upgrade to .NET Framework 4.7.
https://blogs.msdn.microsoft.com/dotnet/2017/06/13/microsoft-net-framework-4-7-is-available-on-windows-update-wsus-and-mu-catalog/

(From that article):

  • Windows 7/Windows Server 2008 R2: KB3186497
  • Windows 8.1/Windows Server 2012 R2: KB3186539
  • Windows 10 Version 1607/Windows Server 2016: KB3186568

This version of .NET Framework is not tested with Task Server and is not recognized by the Potential Task Server filter.

To verify if this is the cause refer below:

  • Open registry and browse to: (note this is NET Framework... not  .NET Framework)
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
  • Read the Version value. If this value reads as 4.7.x then this is the issue.

Resolution

Downgrading to a supported version of .NET Framework will be required.
Supported versions are 4.5.x and 4.6.x. Refer to page# 14 in IT Management Suite (ITMS) Support Matrix HOWTO9965

To uninstall the upgrade, the respective KB numbers listed above needs to be uninstalled from the Windows Updates on the potential Task Servers. Then verify that the version in the registry lists 4.5.x or 4.6.x, if not download and install one of those version's from Microsoft.

NOTES:

  1. Windows 10 Creators Edition comes with .NET 4.7 natively and cannot be downgraded.
  2. Updates to .NET 4.7 after Task Server is installed are not tested and therefore are not supported at this time.