This Computer Only Folders in Outlook: What They Mean

If a folder in Outlook's left-hand pane carries the words This computer only underneath it, that folder is not part of your mailbox. It's stored in a local .pst file on the machine you're looking at, and Outlook will never send its contents to a mail server.

That matters because most people assume everything in Outlook is backed up somewhere. It isn't. A This computer only Contacts folder, Calendar, or set of Notes exists in exactly one place: this laptop's local file. Reinstall Outlook, wipe the drive, or move to a new computer without exporting first, and that data is gone — not archived, not recoverable from the server, gone.

The short answer#

This computer only is Outlook's label for a folder stored in a local Outlook Data File instead of your mail account's server-side storage. It shows up in two situations: POP3 accounts, where the whole mailbox lives locally because POP has no concept of server-side folders, and IMAP accounts, where the Mail folders sync fine but Contacts, Calendar, Tasks, and Notes don't — because IMAP only ever defined syncing for mail.

Outlook still lets you use these folders normally. Add a contact, schedule an appointment, take a note — it all works. It just never leaves the computer you did it on.

Why Outlook creates these folders in the first place#

IMAP was built to sync email between a server and multiple clients. It was never extended to cover contacts, calendars, tasks, or notes — those item types simply aren't part of the protocol. When you add an IMAP account to classic Outlook for Windows, Outlook still needs somewhere to put a contact you save or an appointment you schedule, so it creates local folders for those item types and marks them This computer only.

POP3 accounts are a simpler case: POP downloads mail to your machine and, in most setups, deletes it from the server afterward. There's no server-side folder structure to sync against, so the entire mailbox — Inbox included — lands in a local Outlook Data File.

A third, less common trigger: importing data from another program (an old Eudora or Thunderbird export, for instance) or creating a folder outside your account's actual folder tree. Outlook can't always place that data on the server, so it quietly falls back to a local folder instead of failing outright.

Before you start#

Work out which account created the folder before you touch anything. Go to File, then Account Settings, then Account Settings again, and check the E-mail tab. If the account type column says POP3, expect most or all of that account's data to be local. If it says IMAP, only the non-mail item types (Contacts, Calendar, Tasks, Notes) are typically affected — the Mail folders under that account are already syncing.

Have a destination ready before you move anything: a Microsoft 365, Outlook.com, or Exchange account added to the same Outlook profile. You're not converting a local folder into a synced one in place — that's not possible. You're copying the individual items into a folder that already belongs to a synced account.

Steps to move data out of a This computer only folder#

1. 1

   Confirm the account type

   File > Account Settings > Account Settings > E-mail tab. Note whether the account behind the folder is POP3, IMAP, or Exchange/Microsoft 365.

2. 2

   Add a synced destination account, if you don't already have one

   A Microsoft 365, Outlook.com, or Exchange mailbox in the same Outlook profile. This is where the moved data will actually sync from.

3. 3

   Move contacts

   Open People, select the This computer only contacts folder, select all entries (Ctrl+A), then right-click > Move > Copy to Folder and choose the Contacts folder under your synced account.

4. 4

   Move calendar items

   Open Calendar, switch to List view for the local calendar, select the events you want to keep, and drag them onto the synced account's calendar in the folder pane.

5. 5

   Move tasks and notes

   Same pattern: select the items in the local Tasks or Notes folder, then Move > Copy to Folder into the equivalent folder under the synced account.

6. 6

   Move local mail folders

   For a POP account's local Inbox or subfolders, drag the messages into a folder under an IMAP or Microsoft 365 account instead. Dragging uploads the messages to that account's server storage.

7. 7

   Verify from a second device

   Check Outlook on the web, the mobile app, or another computer signed into the same account. If the contact, event, or message appears there, it's synced. If it doesn't, it's still local somewhere.

Platform differences#

The label, and what causes it, depends heavily on account type and which Outlook you're running. This is the version that trips people up most: the fix that works in classic Outlook for Windows doesn't map cleanly onto every platform.

What to do when it doesn't work#

A few things commonly go wrong when people try to fix this, and none of them mean the data is unrecoverable.

• Drag-and-drop between People folders does nothing visible: use right-click > Move > Copy to Folder instead — it's more reliable than dragging for contacts specifically.
• Items seem to vanish after a move: check Deleted Items on both the source and destination account before assuming data loss. A copy operation that partially fails sometimes leaves a stray item there.
• A local folder keeps reappearing after you delete it: open File > Account Settings > Data Files and check which .pst is marked as the default delivery location for that profile. A profile with the wrong default recreates the same local structure repeatedly.
• New Outlook shows no This computer only grouping at all: that's expected behavior, not a bug — the concept doesn't exist there the same way. Use the Import option under Settings to bring old PST content in directly instead of hunting for a local-folder view that isn't coming.
• You can't find the .pst file itself: search the file system for *.pst, or check File > Account Settings > Data Files, which lists the exact path for every data file attached to the profile.

A faster way to stop caring which computer has the data#

The manual move above works, and for a one-time cleanup it's the right tool. The underlying problem is structural, though: every extra device you add to a POP or IMAP setup is another place data could get stranded locally instead of synced.

AI Emaily connects to Outlook (and Gmail, iCloud, and other IMAP accounts) as a hosted AI email client rather than a per-machine desktop file. Your account connection, your rules, and your Personal Context — the client and tone profiles you set up so drafts sound like you — live with your login, not with one laptop's local .pst. Open it on a new device and the same inbox is there; there's no local-only folder to leave behind.

It doesn't replace Outlook's Contacts, Tasks, or Notes modules — it's an AI email client, not a full PIM — but for the mailbox itself, the This computer only problem doesn't have anywhere to happen. We build AI Emaily, and a 7-day free trial is enough to see whether that trade-off works for how you actually move between devices.