Over the weekend we installed the latest Exchange 5.5 SP3 patch Q248838 in order to utilize the new virus scan API for our product Scanmail from Trend. That all went fine and has been working OK. What we noticed after installing the MS patch is a problem in Outlook Web where we can no longer access the Calendar or Contacts. We have service pack 3 installed on version 5.5 and we could access these items before we applied the patch. I know of a very old problem with this as Q186707, however, that was fixed in SP 2 or the original SP 3. Any thoughts before I call Microsoft??<br><br>David Hale