Your Outlook contacts are stored in the OST file with your emails and calendars. To quickly extract contacts, use Outlook’s Import/Export feature to import OST to Outlook as a PST file to save the Contacts folder.
For damaged or inaccessible OST files, convert the .ost to .pst file, or export contacts online using Outlook Web Access (OWA). These methods make it easy to back up and recover your Outlook contacts.
Reasons to Extract Contacts from the OST file
At times, you need a quick way to extract contacts from Outlook OST file. If you’re switching computers or having trouble with a stuck inbox, it’s important to export Outlook contacts easy to access.
- When moving to a new PC or switching from Outlook to Gmail or Microsoft 365.
- When the Outlook profile becomes corrupted or loses connection to the Exchange server.
- When contacts need to be recovered from OST files that are inaccessible in Outlook.
- When creating backups or sharing contact lists with another account, CRM, or team.
If it is active, first try the manual approach to retrieve your data safely.
Checks Before Exporting OST Contacts
| Issue | Description | Best Practice |
| OST Access Issues | OST files are encrypted and locked to a single Outlook profile; they cannot be accessed outside the original account. | Only use the manual method if the original Outlook profile is active and connected. |
| Export Format Quality | CSV exports can lose important data like photos, notes, and custom fields, leading to incomplete contact info. | Always prioritize exporting to a PST file for the most complete data transfer, as this format retains all rich metadata. |
| Large File Size | Big OST files exceeding 15-20GB may cause exports to be slow, freeze, or fail entirely, impacting the mailbox migration. | For very large files, use a professional conversion tool designed for high-capacity files. |
| Missing Contacts | Entries might be overlooked in the “Deleted Items” folder or the “Hidden Contacts” view. | Review these folders before starting the export process. |
| Data Security | Exported files contain sensitive information. | Protect the exported files through encryption or password protection. |
Methods To Get Contacts From The OST File
Before using recovery tools, these are the methods to extract contacts from OST files: Extracting contacts via Outlook for accessible files, Remo OST to PST converter for inaccessible or corrupt OST files, or the Outlook Web Access(OWA) method for online access from your Exchange account.
Extract Contacts from the OST file using Outlook Tools
Use this method to extract contacts if the Outlook profile is still connected to the Exchange server.
Steps:
- Open Outlook and go to File > Open & Export > Import/Export.
- Select Export to a file, and then click Next.
- Select Outlook Data File(.pst) and click Next.
- In this step, select Contacts and click Next.
- Click the Browse button, select your file saving location, and then click Finish.
Extract Contacts from the OST file using Remo OST to PST Converter
If your OST file is corrupted, damaged, orphaned, or inaccessible, use Remo OST to PST Converter.
It’s an easy-to-use Windows tool that lets you convert OST files to PST with just a few clicks, safely recovering emails, contacts, calendars, notes, and other Outlook items.
It also keeps your folder structure, rules, autocomplete entries, and formatting intact for smooth data recovery and migration.
- Launch the software, choose the Open OST File option (to locate the OST file) or Find OST File option (to locate the OST file automatically), and click Next.
- Select the Browse button on the following screen to enter the location where you wish to save the converted PST file, then click Convert.
- When the conversation is done, click on Finish.
Extract Contacts from OST file using Outlook Web Access (OWA)
For users with an Exchange account, contacts can also be exported directly from OWA (Outlook Web Access) without using Outlook or third-party tools.
Steps:
- Log in to your Exchange account via OWA.
- Navigate to the People or Contacts section.
- Select the contacts you want to export.
- Choose Export Contacts and select a format such as CSV.
- Save the exported file to your computer and import it into Outlook, Gmail, or other platforms.
Common Mistakes that should be avoided while Extraction
- Extracting contacts without verifying the Outlook profile is connected to the Exchange server can result in incomplete or outdated data.
- Attempting extraction from a corrupted or unhealthy OST file may lead to errors, failed exports, or data loss.
- Ignoring hidden or deleted contacts can cause important contact details to be missed.
- Using tools that don’t fully support OST-to-PST conversion may omit critical information, such as phone numbers, job titles, company names, or custom fields.
- Skipping preparatory checks increases the risk of duplicates, incomplete entries, or corrupted PST files.
Conclusion
This article highlights the methods for exporting contacts from the OST file. It covers the manual method of exporting contacts, then suggests using OST to PST Converter tool for a quicker, more secure solution.
Additionally, Exchange users can utilize Outlook Web Access (OWA) for a fast, web-based export. These options provide convenient ways to extract contacts from OST files with minimal hassle and maximum security.
Frequently Asked Questions
Export contacts from Outlook through File > Open & Export > Import/Export, select Export to a file, choose Outlook Data File (.pst), and select the Contacts folder to create a backup or migrate them to another platform.
Contacts from email accounts can be exported through the Contacts/People section. Export options like CSV or PST make it easy to back up, transfer, or integrate contacts with other platforms while keeping all details intact.
An email address extractor tool automatically collects and organizes email addresses from files, emails, or websites. It streamlines contact management, saves time, and helps maintain accurate mailing lists.
Yes, email contacts can be exported to Excel by saving them in CSV format, which Excel reads directly. This allows easy management, editing, and transfer of contacts across platforms without losing details.
To export emails from Outlook, go to the File tab, select Open & Export, and choose Import/export. Pick Export to a file and select Outlook Data File (.pst). Choose the email folder to export, making sure to include the subfolder if needed. Save the file, name it, and click Finish to complete the export.
