How to Find Missing Outlook Subfolders and Address Book Contacts
Question details
The user is unable to locate their Outlook Inbox subfolders and address book contacts, and needs help recovering or finding this missing mailbox data.

- Product
- Microsoft Outlook
- Device & OS
- Windows
- Scenario
- Navigating the email inbox and attempting to compose a new message using saved contacts.
- Observed behavior
- Data inside Inbox subfolders appears to have disappeared, and saved email addresses no longer populate the Address Book or the auto-complete suggestions in the 'To' field.
Verify that your Folder Pane is fully expanded by clicking the small arrow next to your Inbox, and confirm you are viewing the correct Outlook data file or email account.
Locate Missing Subfolders and Verify Address Book Settings
Use this solution to manually check if folders are collapsed or if the wrong address book is currently selected in your Outlook view.
Often, missing subfolders and contacts have not been deleted but are simply hidden from view due to collapsed folder trees or incorrect address list selections.
In the left-hand Folder Pane of Outlook, look for your email account and click the arrow next to the 'Inbox' folder to reveal any hidden subfolders.
Navigate to the 'Home' tab on the Outlook ribbon and click on 'Address Book' in the Find group.
In the Address Book window, click the drop-down menu under 'Address Book' and select the specific list (e.g., Contacts, Global Address List) that contains your saved entries.

Perform an Online Repair of Microsoft Office
If Outlook is malfunctioning and failing to display mailbox information correctly, repairing the Office installation can resolve underlying software issues.
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Frequently Asked Questions
Why did my Outlook subfolders suddenly disappear?
Subfolders often disappear if the main Inbox folder is accidentally collapsed in the Folder Pane, if they were unintentionally dragged into another folder like 'Deleted Items', or if there is a synchronization issue with your email server.
Will repairing Microsoft Office delete my emails or contacts?
No. Running an Online Repair from the Windows Control Panel only fixes the application software files. Your personal emails, folders, and contacts are stored securely in your Outlook data files (PST/OST) and will not be deleted.
How do I restore contacts deleted from my Outlook address book?
You can typically recover accidentally deleted contacts by navigating to your 'Deleted Items' folder in Outlook, finding the contact, right-clicking it, and selecting 'Move' > 'Other Folder' to return it to your Contacts list.
Why isn't Outlook auto-completing email addresses when I type?
The Auto-Complete list is separate from your main Address Book. It can stop working if the Auto-Complete cache is corrupted or if the setting is disabled. You can re-enable it in Outlook by going to File > Options > Mail, and checking 'Use Auto-Complete List to suggest names when typing in the To, Cc, and Bcc lines'.




