Exchange 2010 SP2 RU5 installation issues

Because installation of Rollup 5-v2 for Exchange 2010 SP2 sometimes can be painful, we present list of tips how to install RU5 for Microsoft Exchange 2010 SP2.

First read  KB 2785908

Don’t use WSUS to install Rollup 5. Just download it manually from Microsoft Download Center.

Before installation of Rollup 5-v2 make sure you don’t have installed  KB2506146 and KB2506143. Uninstall them.

Backup your customized Outlook Web App files. Rolllup will updates the Outlook Web App files if they are required and any customizations of logon.aspx file will be overwritten.

When you install this update RU5 on computer without internet connection, you may experience long installation times. To install fast clear the Check for publisher’s certificate revocation in the Security section of Internet Option (IE).

if you have deployed CAS-CAS proxying,please apply the update rollup on the Internet-facing Client Access servers before you apply the update rollup on the non-Internet-facing Client Access servers


Exchange 2010 SP2 Rollup 5-v2 installation error 80070643


If during installation of Rollup 5-v2 for Microsoft Exchange Server 2010 SP2 you receive error 80070643, it’s caused by WMF 3.0 (Windows Management Framework 3.0).

Windows Management Framework 3.0 is installed with following windows updates for Microsoft Windows 2008 or Windows 7  (KB2506146 and KB2506143)

So before installation of Rollup 5-v2 check and uninstall these KB2506146 and KB2506143 and WMF 3.0


Also remember to run installation of any Rollup with  elevated privileges Run as Administrator


Exchange Server 2010 and 2007 Issues with Windows Updates KB2506146 and KB2506143

Watch for Windows Updates KB2506146 oraz KB2506143 and error

Exchange Server 2010 or Exchange 2007


Microsoft recently released updates KB2506146 and KB2506143 for operating systems Microsoft Windows 2008, 2008 R2 and Windows 7.

If you have Microsoft Exchange 2010 or Microsoft Exchange 2007 don’t install these updates.

Exchange Server 2010 and Exchange Server 2007 have some issues with these updates KB2506146 and KB2506143.

These updates will install Windows Management Framework 3.0 with PowerShell 3.o which is not supported by Exchange Server 2010 nor 2007.

You can read about updates here:

  • KB2506143 is the WMF 3.0 update for Windows Server 2008 R2 SP1 and Windows 7 SP1;
  • KB2506146 is the WMF 3.0 update for Windows Server 2008 SP2.


After you install these updates, your Exchange Server 2010 or 2007 system can be unavailable or unusable. It also include workstations with Windows 7 and Exchange Management Tools.

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