You may need to remove an old or unused email account from Outlook. This could be due to a job change, switching providers, or simply cleaning up your profile. Removing an account incorrectly can delete your emails, contacts, and calendar events. This article explains how to safely disconnect an account while preserving all your data locally.
Key Takeaways: Safely Removing an Outlook Account
- File > Account Settings > Account Settings: The primary menu for managing email accounts where you can safely remove one.
- Export to a .pst file: Creates a permanent local backup of all data from the account you are removing.
- Close the data file after removal: Prevents Outlook from trying to access a disconnected account’s data, which can cause errors.
Understanding Account Removal and Data Files
Outlook stores your email account’s data in a file on your computer. For Microsoft 365, Exchange, and Outlook.com accounts, this is typically an Offline Outlook Data File (.ost). For POP and IMAP accounts, it is a Personal Folders File (.pst). When you remove an account using the correct method, Outlook only disconnects from the mail server. The local data file remains on your hard drive. You can then choose to keep that file connected to your Outlook profile as an archive or disconnect it entirely.
The critical step is to ensure your data is backed up or archived before you delete the account. Simply clicking Remove in the account settings will not delete your local emails if done correctly. However, for POP accounts where emails only exist on your computer, you must export the data first. For accounts using Cached Exchange Mode, your local .ost file contains a full copy of your mailbox.
Steps to Remove an Account and Preserve Data
Follow these steps to disconnect an email account while keeping all its emails, calendar items, and contacts.
- Back up your data with an export
Open Outlook and go to File > Open & Export > Import/Export. Select Export to a file and click Next. Choose Outlook Data File (.pst) and click Next. Select the top-level folder for the account you want to remove. Check the box for Include subfolders. Click Next, browse to a safe location like your Documents folder, and click Finish. - Remove the email account
Go to File > Account Settings > Account Settings. Select the Email tab. Click on the account you wish to remove to highlight it. Click the Remove button above the list. Confirm the prompt by clicking Yes. The account will disappear from the list. Click Close. - Close the old data file
After removing the account, its data file may still appear in your folder pane. Right-click the root folder for the removed account, such as OldEmail@domain.com. Select Close “OldEmail@domain.com” from the context menu. This detaches the file from your profile without deleting it from your computer. - Verify your data is safe
Navigate to the location where you saved the .pst backup file. Right-click the file and check its Properties to confirm it has a file size greater than zero. You can also re-open this .pst file in Outlook anytime via File > Open & Export > Open Outlook Data File to access your archived messages.
Common Mistakes and Things to Avoid
Deleting the .pst or .ost File from Windows Explorer
Never manually delete the .ost or .pst file from your Documents or AppData folder before using the Close command in Outlook. This can cause Outlook to crash or generate errors about missing data files. Always remove the account and close the data file through Outlook’s interface first. The physical file can be deleted from File Explorer afterward if you have a confirmed backup.
Assuming POP Account Emails Are on the Server
POP accounts often download emails and then delete them from the server. If you remove a POP account without exporting its data first, those emails could be lost forever. Always perform the Export to a file step for POP accounts. For IMAP and Exchange accounts, your emails are typically still on the server, but a local backup is still recommended.
Not Checking Shared Mailbox or Delegate Permissions
If the account you are removing is used to access a shared mailbox or you have delegate permissions on another calendar, those will stop working. You must ask the mailbox owner to grant access to your primary account before removal. Otherwise, you will lose access to that shared data.
Account Removal Methods Comparison
| Item | Remove via Account Settings | Delete Profile via Control Panel |
|---|---|---|
| Primary Use | Remove one account from a multi-account profile | Delete entire Outlook profile and all accounts |
| Effect on Data | Keeps local data file; can archive | Can delete all local data if not backed up |
| Outcome | Other accounts in profile remain fully functional | Requires setting up Outlook from scratch |
| Recommended For | Standard account cleanup | Resolving severe corruption in a profile |
You can now safely remove an outdated email account from Outlook. Your historical data remains accessible in a local archive file. For future changes, consider using the Archive feature in Outlook to move old items automatically. An advanced tip is to use the Mail app in Windows Control Panel to create a new Outlook profile if you ever need to start fresh while keeping old .pst files intact.