Monthly Archives: January 2013

How to synchronize Public Folders (Exchange 2007/2010)

When migrating to a new (version of) Exchange this is how you can synchronize the Public Folders :

Start the exchange management shell and execute the following code :

You should be able to do this using the Exchange Management Console but this often doesn’t work. After executing the above script you should be able to check and edit it again using the console although.


No internal mail between Exchange 2007 and 2010 (solved)

A customer of mine ran into a problem while migrating from Exchange 2007 to 2010. They didn’t receive any internal email. Here are the properties of the default receive connector :

oude instellingen 0057 001

That’s the problem. Make sure you enable Transport Layer Security (TLS) and Exchange server authentication.

oude instellingen 0057 004

When you enable Exchange Server authentication you have to make sure that your FQDN matches your server FQDN (mailserver.corp.local or something like that)

oude instellingen 0057 003

Now you should be able to receive mail. Make sure you edit al your receive connectors (when multiple exchange servers are present in your Exchange organisation)

Press Release: Project VRC

See below for the press release from Jeroen en Ruben about Project VRC ‘Phase V’ :


Project VRC released new
white paper about impact of antivirus on VDI

Amsterdam, 17 January,
– Project Virtual Reality Check (Project VRC) is pleased
to announce the release of the long awaited ‘Phase V’ white paper which
provides independent insights in the impact and best practices of various
antivirus (AV) solutions on VDI performance.

The R&D project ‘Virtual Reality Check’ (VRC) was started in early 2009 by
the Dutch IT companies PQR (
and Login Consultants (
and focuses on research in the desktop virtualization market. Several white
papers were published about the performance and best practices of different
hypervisors, application virtualization solutions and Windows Operating Systems
in server hosted desktop solutions.

This new white paper contains the test results of the VDI performance impact of
the antivirus solutions from three leading vendors: McAfee, Microsoft and

When VDI is implemented into production, performance is often a serious
issue. A performance impact of up to 40 percent is not unusual after antivirus
is installed.
” said Jeroen van de Kamp, CTO of Login Consultants “While
this aspect has been less of an issue with PC’s or laptops, with performance
sensitive environments like VDI it means you need to invest in servers and
storage. This was the reason for us to investigate, and provide objective data
about, the exact impact of antivirus on VDI

It is important to highlight the fact that Project VRC does not evaluate
the quality of the security features of the different AV products, but only
provides information about the impact these solutions have on VDI performance

said Ruben Spruijt, CTO of PQR “By testing and comparing different solutions
and configurations we discovered the best practice to perform a pre-scan of the
master image before it’s deployed. The effect is huge and therefore highly

Another key finding published in the white paper is that antivirus off-loading
architectures makes a big difference from a storage IO point of view, but not
always from a session density point of view.

All Project VRC tests are performed with Login VSI (, the
industry standard benchmarking tool for VDI. This software tool simulates
typical user workloads to objectively test the performance of VDI and Server
Based Computing environments. The full test methodology is described in the
white paper.

This and all other Project VRC white papers can be downloaded for free at To
keep up-to-date with the latest developments you can follow Project VRC on
Twitter @ProjectVRC.