Blackberry: "Error Encountered 0x80040ff8, Check Documentation"

Solution 1:

1. Use BlackBerry® Desktop Manager to back up the data on the BlackBerry smartphone.
2. Clear the Calendar database on the BlackBerry smartphone.
3. Perform the synchronization again.
   

Solution 2:

Delete the Intellisync folder:

• Close the desktop manager application.
• Disconnect the BB from the computer.
• Double Click on My Computer> Local Disk (C Drive>Documents and Settings>(username)>Application Data>Research In Motion>
• Blackberry>Intellisync. (If the Application Data folder is not present, click Tools>Folder Options at the top of the screen.)
• Click the View Tab, then click on Show Hidden Files and Folders.
• Click Apply>Ok and continue through the remaining steps.
• Delete everything within the Intellisync folder.
• Launch desktop manager and attempt sync the device with the computer.