500 Internal Server Error – The target principal name is incorrect


Today I ran into this error while publishing a website using ISA Server 2006. The solution was simple. While publishing the website make sure make sure that the name at the to field is the same as the name as the external DNS name. When your ISA Server doesn’t use DNS server, make sure you add the name in the local hosts file.

Cannot log into hosted sharepoint on Office 365 with IE 9


Today a co-worker found the solution of not able to login into Office 365′ sharepoint.

The solution was simple but effective :

Open IE9, –> tools –> Security –> Trusted Sites –> Sites. Add the following sites :



Thanks Bob! :-)



I’m back online! :-)


Yes, I know. I haven’t been updating my blog regularly. But now I’m back. Smile The following weekens I have some exams planned (VMware, Citrix) and currently I’m doing several interesting projects. The last months I saw some of you on several events (VMUG, DUCUG) and spoke to you. So for now, until the next post Smile !

W2K8 Clustering

Howto : Windows 2008 Cluster


Snel en simpel, hoe configureer je configureer je clustering in Windows Server 2008.

Download de howto hier : Windows 2008 Clustering Howto

W2K8 Clustering

The Role of Memory in VMware ESX Server 3


Interessant document : esx3_memory

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