How to Extract Email Addresses from Office 365?
Quick Answer: Office 365 contains email addresses in different places, including user accounts, Outlook contacts and email messages. To extract email addresses from Office 365, first identify where the addresses are stored. An admin can download a list Office 365 users as a CSV file. Outlook desktop can export saved contacts or mailbox data, while Outlook on the web can export contacts directly to CSV. If you need to extract all email addresses from a large number of mailbox messages, a dedicated Office 365 backup tool can make the process easier.
Table of Contents
- Which Method Should You Use?
- Method 1: Extract Email Addresses from Office 365 Admin Center
- Method 2: Export Contacts Using Outlook Desktop App
- Method 3: Export Email Addresses from Office 365 Using Outlook Web
- Method 4: Extract All Email Addresses from Office 365 Automatically
- Watch Video Tutorial
- Sample Output After Extracting Email Addresses
- Use Collected Email Addresses Responsibly
- Conclusion
- Frequently Asked Questions
Which Method Should You Use?
Before extracting addresses, decide whether you need contacts, addresses from email messages or data from an entire mailbox.
Each method is suitable for a different requirement. Choosing the right one can save time, especially when working with a large Office 365 mailbox.
| Requirement | Recommended Method | Best for |
|---|---|---|
| Extract email addresses of Office 365 users | Extract Through Office 365 Admin Center | Administrators |
| Export saved contacts | Outlook desktop | Contacts and address book |
| Export contacts without desktop Outlook | Outlook Web App | Quick contact export |
| Extract email addresses in bulk | Advik Office 365 Backup Tool | Large mailboxes |
One important point is that a list of office 365 users is different from all email addresses found in a mailbox. Therefore, select the method based on the type of addresses you actually need.
Now, let’s explore how to do it step-by-step.
Method 1. Extract Email Addresses from Office 365 Admin Center
Either you are an admin or you have permission from an admin; then you can download your contact list. It saves the user list with email addresses in CSV file.
1. Sign in to your Microsoft 365 Admin Center.
2. Now, click on the Recipients option.

3. Next, click on the Contacts option.
4. Tap on the three dots and select Export Data to CSV.
With this approach, you will also get other contact details with the email addresses.
Method 2. Export Office 365 Contacts Using Outlook Desktop App
Outlook desktop is useful when email addresses are stored in the account’s Contacts folder. Classic Outlook includes an Import/Export Wizard that can export to a CSV file.
To use this method, you’ll first need to set up your account in Outlook and then export the contact details to a CSV file.
Follow the steps below to extract email addresses from Office 365 to CSV file:
Step 1. Launch the Outlook application on your system.
Step 2. Click on File and choose Add Account.

Step 3. Enter your Office 365 webmail account and click Connect.

Step 4. Enter the password for your Microsoft 365 account, then click Sign In.

Step 5. Follow the instructions to set up the account and click OK when you are done.

Step 6. Restart Outlook after setup is complete.
Step 7. Now, click on the File tab again.

Step 8. Click on Open & Export and select the Import/Export option.

Step 9. Choose Export to a file from Import and Export Wizard and click Next.

Step 10. Select Comma-Separated Values (CSV).

Step 11. Choose the Contacts folder under your Office 365 account.

Step 12. Browse the location, name the file, and click Finish.

You can open the CSV file in Microsoft Excel and view the contact names, email addresses, phone numbers and other exported fields.
Limitations of this Approach
- Time-consuming and lengthy
- No filter or customization options
- Won’t work if Import/Export is disabled in Outlook
- Not ideal for non-technical users
- Cannot extract emails from message content (only contacts)
Method 3. Export Email Addresses from Office 365 Using Outlook Web
Outlook Web App provides a direct option to export contacts from Office 365 to CSV.
1. Log in to Outlook for the web using your Office 365 mail account credentials.
2. Tap on the People section on the left panel.

3. Click on Manage Contacts and select the Export Contacts option.

4. Choose either the export all contacts or contacts from a specific folder option.
5. After that, click on the Export button.

Now, you can download your email addresses in CSV format.
Once you download you can open it in Excel
Method 4. Extract All Email Addresses from Office 365 Automatically
If you want a quick and easy way to extract email addresses from Office 365, the Advik Office 365 Backup Tool is the ideal solution. It helps you retrieve email addresses from your Office 365 mailbox directly. You don’t need to set up Outlook or do anything manually. One of the best features of this tool is the “Extract Email Address” option. It automatically scans your mailbox and collects all email addresses, no technical skills required.
You can extract sender, recipient, CC, or BCC email addresses from different folders like Inbox, Sent, Drafts, or even custom folders. The tool makes everything simple, fast, and accurate.
Click on the free download button and check it’s working process.
Steps to Extract Email Addresses from Office 365 in Bulk
Step 1. Open the tool and sign in with your Office 365 email credentials.

Step 2. Choose folders (like Inbox, Sent, etc.) to scan.

Step 3. From the saving options, select “Extract Email Address”.

Step 4. Choose a location to save the file & click the Backup.

Done! Your extracted email addresses will be saved at the chosen location.
Watch How to Export All Email Addresses from Office 365
Sample Output After Extracting Email Addresses
After collecting addresses, it is useful to organize the information instead of keeping a long unstructured list.
| Address | Name | First Seen | Last Seen | Count |
|---|---|---|---|---|
| alex@example.com | Alex Wilson | Jan 2026 | Sep 2026 | 42 |
| info@company.com | Company Info | Feb 2026 | Sep 2026 | 18 |
| sales@example.com | Sales | Mar 2026 | Sep 2026 | 27 |
| maria@example.com | Maria Jones Wilson | Apr 2026 | Sep 2026 | 11 |
A structured list makes it easier to identify duplicate addresses, understand communication history and export the information for business or administrative purposes.
Use Collected Email Addresses Responsibly
Extracting email addresses does not automatically give you permission to use them for marketing.
If you extract addresses from Office 365 message, consider why they were collected and whether you have a lawful reason to use them for a new purpose. For marketing emails, requirements can vary depending on the recipient location, your organisation and the type of communication.
In the United States commercial email is subject to the CAN-SPAM Act, while the GDPR and related privacy rules can apply when processing personal data involving people in the European Economic Area.
Before using an extracted list For marketing:
- Use addresses only for an appropriate and lawful purpose.
- Do not assume that receiving an email means the person agreed to marketing.
- Provide an appropriate unsubscribe option where required.
- Keep collected data secure.
- Avoid sharing email lists without a valid reason or legal basis.
- Follow the privacy and data-protection requirements applicable to your organisation.
If the email addresses are being extracted for backup, migration, investigation or internal communication, document the purpose and limit access to the extracted data.
Conclusion
There is no single Office 365 option that extract every type of email address from every location. The appropriate method depends on where the email addresses are stored and how much data you need to process.
For organisation users, the Microsoft Admin can download a CSV file containing Email addresses. For saved contacts Outlook desktop and Outlook web provide a CSV export option. When you need to work with a large mailbox, the Office 365 email address extractor helps create a local copy of email addresses for further processing.
If your objective is to extract email addresses from a large number of emails, rather than just saved contacts, a professional solution is more suitable than manually copying email addresses from individual messages.
Questions and Answers
Q1. How can I copy all email addresses from one email?
Ans. To extract all email addresses from Office 365 email, open the message and expand the recipient details. Copy the displayed recipients and paste the addresses into Excel.
Q2. Can I extract email addresses from Office 365 Inbox emails?
Ans. Yes, the Advik tool allows you to extract addresses from email headers and content, not just contacts.
Q3. Is it possible to export email addresses to Excel directly?
Ans. Yes, the extracted data is saved in .CSV format, which can be opened in Excel.

