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0x8004010F: Outlook data file cannot be accessed. Today I moved my .PST files and this is the error I received: 0x8004010F: Outlook data file cannot be accessed. or 0x8004010F: The operation failed. An object could not be found. Most of the forums I found suggest creating a new profile, this was not good news for me because I have 5 different email accounts in outlook. This is what fixed it for me: 1. From Outlook 2010 click File>Account Settings>Account Settings 2. Click Change Folder 3. Click New Outlook Data File (This is just temporary) 4. Give it a name (I used "Test") 5. Click the + to the left of the folder name to expand the subfolders. Click Inbox. Click OK. 6. Then Click Change Folder 7. Click Select the one you want 8. Click the + to the left of the folder name to expand the subfolders. Click Inbox. Click OK. 9. Close Account Settings and click send/receive.