Dear All, Anyone seen this before ? Microsoft outlook clients when trying to connect to the Exchange corporate server it freezes for a while ( about 10 to 20 seconds ) then it says server is not available ( try again or work offline ) and when choosing try again it connects to the server , and when first pressing the send/receive button it freezes again for about the same period . and then it works all fine as long as the outlook is still running . Its the first time to see such problem on my server since 3 years ago.. Note: it happened after installing the last critical updates published by MS last week, and tried to uninstall them , but still same problem... Any Idea what causes this freezing and delay ?? Thanks in advance for your help... Sherif