Email Migration

How to Transfer Business Email Accounts Without Sharing Old Emails

Olivia Miller Oct 13, 2026 869 views

Question details

The user wants to transfer business email addresses and a domain to new owners while ensuring the old messages and personal information remain inaccessible to the new users.

How to Transfer Business Email Accounts Without Sharing Old Emails

Product: Microsoft 365
Device & OS: not provided
Scenario: Transferring business ownership and handing over the company domain to new management.
Observed behavior: The goal is to separate the former accounts from the new owners' accounts by preventing historical email access while keeping the same email addresses.

Before you start

Before deleting any mailboxes or transferring your domain, verify that you have active administrative access to your Microsoft 365 admin center and have notified all current users to back up their personal files.

Solution 1Recommended

Export Old Data and Provision New Mailboxes

To ensure former emails remain private during a business transfer, export the existing data, delete the old accounts, and create completely fresh mailboxes for the new owners.

When handing over a business domain, simply changing the password on an existing email account exposes sensitive historical data and personal information to the new owner. The safest approach is to decouple the old data from the domain by deleting the user completely and provisioning a new account with the exact same email address.

Export Mailbox Data

Before making any changes, use the Outlook desktop client to export any required emails, contacts, and calendar data to a local PST file for your own archives.

Delete Former Accounts

Log into the Microsoft 365 admin center, navigate to 'Active users', select the former owners' accounts, and click 'Delete user'. This places the mailboxes in a 30-day soft-delete state.

Permanently Remove Data (Optional)

If you require the data to be purged immediately instead of waiting for the 30-day retention period to expire, an administrator can use Exchange Online PowerShell to permanently delete the accounts.

Transfer the Domain

Follow Microsoft's official guidance for removing a former employee and properly transferring the domain to the new tenant or ownership if required.

Create New Mailboxes

Once the previous accounts are removed, create new Microsoft 365 user accounts for the new owners using the same business email addresses. They will receive entirely separate, empty mailboxes.

Export Old Data and Provision New Mailboxes

Privacy Ensured: Because the newly created accounts are entirely separate from the deleted ones, they will not contain any of the old mailbox contents, ensuring complete privacy.

Free Microsoft Office alternative

Equip Your New Business Owners with WPS Office

After successfully transferring your domain and email accounts in Microsoft 365, provide your new business owners with a powerful and free office suite. WPS Office is a lightweight, easy-to-use alternative that handles all business documentation seamlessly.

1. Download and Install: Download the free WPS Office suite from the official website and install it on your business computers.
2. Open Existing Business Files: Easily open your legacy Word documents, Excel spreadsheets, and PowerPoint presentations without formatting loss.
3. Create and Share: Draft new business plans or financial reports and share them directly via your newly configured business emails.

Fully compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.Free and lightweight solution ideal for newly transferred businesses looking to save on software costs.Familiar user interface ensures a smooth transition and requires no additional staff training.Built-in PDF toolkit to easily manage, sign, and edit business contracts and invoices.

microsoft office alternative - wps office

Frequently Asked Questions

How long are deleted Microsoft 365 emails retained?

When you delete a user account in Microsoft 365, the mailbox and its contents are soft-deleted and retained for 30 days by default. During this window, an administrator can restore the account before it is permanently purged.

Can I transfer the domain without deleting the old email accounts?

While it is technically possible to hand over credentials, doing so grants the new owners full access to all past emails. To guarantee privacy and separate old data from new owners, deleting and recreating the accounts is the recommended method.

How do I permanently delete an account immediately?

To bypass the standard 30-day soft-deletion period, a Microsoft 365 administrator must connect to Exchange Online via PowerShell and execute specific commands to permanently delete the mailbox and remove all associated data instantly.

How can I read the PST file after I export my old emails?

You can open the exported PST file using the Microsoft Outlook desktop client on your local computer. This allows you to view all your historical emails, contacts, and calendar events securely offline.

Migration & Recovery