How do you create a complete email backup before moving to a new system?

Hello @Steven Miller

I understand you want to move your email account to a new environment and you are carefully thinking about how to keep every detail safe, including folders, attachments, contacts, and the overall structure.

To help you better, might I confirm:

• Are you currently using Outlook with Microsoft 365 or another client? -> This matters because each client has different export options, and knowing which one you use helps me suggest the right steps.
• Do you want the backup mainly for offline access or just as a safety archive? -> This helps me recommend the most suitable format, since some people want to open the backup regularly while others only need it stored securely.
• Where do you plan to transfer the mailbox? -> Knowing the destination (for example, another Outlook profile, a different provider, or a local archive only) helps me explain how the backup will be restored or imported later.

Along the way, I will also share a few steps that you can try if you are using Microsoft Outlook

1/ Export to PST  

This format is designed to hold all emails, attachments, folders, and metadata.  

• In Outlook, go to File > Open & Export > Import/Export.  
• Choose “Export to a file” then “Outlook Data File (.pst)”.  
• Select your mailbox and make sure “Include subfolders” is checked.  
• Save the file to a secure location.  

-> You will have one file that contains your entire mailbox with hierarchy intact.  

2/ Check PST after export  

After export, open the PST in Outlook (File > Open > Outlook Data File). This step is important because it confirms that the backup is complete and usable. By checking, you can see if all folders are present, attachments open correctly, and read/unread status is preserved. It is better to catch any missing data now rather than after the migration.  

3/ Backup contacts  

Contacts are stored separately, so it is good to export them as well.

Use the same Import/Export wizard and choose “Contacts” to ensure they are preserved.  

4/ Store safely  

Keep the PST file in a secure location, ideally with a second copy on external storage. This way you have redundancy if one copy becomes inaccessible.  

If you get stuck while trying the steps above, please share a screenshot or provide more detailed information. I will check the situation and continue to support you.

Kind regards, 

If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in "our documentation" to enable e-mail notifications if you want to receive the related email notification for this thread.