Hi All,
The below mentioned error is very common in OCS R2 specially when we use windows 2008 R2. the best practice if you work In IIS7 I think you will not get find any issues.
check out the following link were all the setting is mention for IIS 7.
http://ocsissues.blogspot.com/2010/02/iis-7-settings-for-ocs-r2-with.htmlRegrds
Zahoor Hakeem
PC solution India.