Error codes

0x8004010F

The Outlook data file cannot be accessed

What it means

Outlook found its profile but not the PST or OST file behind it, so the mailbox cannot open.

Common causes

• A moved or renamed data file
• A damaged OST cache
• A profile pointing at the wrong path

How to fix it

1. Run outlook.exe /resetnavpane and start Outlook again.
2. Repair the file with scanpst.exe (search for it in the Office folder).
3. Open Control Panel > Mail > Show Profiles, create a new profile, add the account there and set it as the default.
4. If the file is gone, restore it from a backup before recreating the account.