MSExchange 2010 OWA Error 63

Hi All,

I've Exchange 2010 version 14.02.0342.003 installed in my environment. 

I got an issue with OWA, Event ID 63 which states -- "The configuration settings have been read and updated successfully. Virtual directory: "owa". web site: "Default web site"".

Later after this event, OWA for that CAS server got failed for some fraction of second. We may say a connectivity drop, but later it got sucess again.

I just want to know the reason behind this.. Let me know if any. Thanks!