I have a w2k/e2k front end server that has been randomly getting a 500 INternal SErver error message when accessing OWA. it will happen once out every say... 20 times of logging in, for any user. I have done everything the MS knowledge base articles say. If I set IE to uncheck the 'show friendly http messages', the page will show up blank (on the random failure) any one figure this out. I opened all the exchange ports specified by Microsoft for Exchange to back end server... -Jason