Apple Thoughts: iOS 4 Exchange Server Fix

"It hasn't gotten quite the attention of the iPhone 4's antenna problems or its proximity sensor troubles, but iOS 4 has caused some heartbreak for corporate users who connect to Exchange servers -- checking mail or syncing contact and calendars can stall out interminably, with no option but to restart and try again."

According to Apple, "immediately after updating to iOS 4, some users may notice that Exchange ActiveSync Mail, Contacts or Calendars do not sync, or sync very slowly. In addition, some Exchange Server administrators may notice their servers running slowly." The problem is the default timer set for a 30 second timeout, so the update sets the timeout to 240 seconds, which appears to fix this syncing issue for most users.