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How to Combine Two Microsoft 365 Accounts Together?

  Mark Regan
Mark Regan
Published: May 22nd, 2025 • 7 Min Read
Businesses that have multiple Office 365 accounts have problems in managing them. That’s why, merging them to one account is a great way to handle your data. In this article, we are going to explain the reasons to merge two office 365 accounts and different ways to combine them together.
Table of Contents
  1. Why Users Wants to Combine Microsoft 365 Accounts?
  2. Preparations Before The Methods
  3. How to Merge Two Office 365 Accounts? [MS Outlook]
  4. Combine Microsoft 365 Accounts by Tenant-to-Tenant
  5. Combine Office 365 Accounts with Professional Software
  6. Concluding Words

There are many organizations who want to combine their Microsoft 365 account. However, it is not an easy and straightforward process. Office 365, does not provide you with in-built features to completely merge accounts, especially across tenants. But, you can move your data from one account to another. By using this you can combine your data.

Why Users Wants to Combine Microsoft 365 Accounts?

Before we go through the methods, let’s see the scenarios where you need to merge two email accounts in Office 365.

  • If your company is merging or acquiring then you need to combine your company accounts to unify your data and email accounts.
  • To make the process of data management simpler. Merging your accounts helps you managing multiple Outlook 365 accounts.
  • You are switching to a new job and want your old data to be a new account. Then, combining is a simple way to do so.
  • Having multiple Microsoft 365 licenses and admin accounts can be costly. But, by merging them can help you in so many ways.
  • It also helps you in sharing your file, email communications and Team collaboration across different users.
  • If you have two accounts for personal and professional use. Combining your account and data makes it easier for you.

So, with all these reasons you can understand why you need to merge two Office 365 accounts. Now, let’s see the methods and preparations of merging Office 365 tenants.

Preparations Before The Methods

Before starting the process, you have to first prepare yourself. There are some points that you pay attention to before going through the methods.

  • First, check your storage space of your accounts to save multiple data in it.
  • Search and note your roles and admin privileges. Make sure that you have the proper permissions to combine the data.
  • Make sure the license of the Microsoft 365 account is enough to move your data.
  • Protecting your important data is a must, therefore backing up your Office data is crucial.
  • If you are moving your domain from one tenant to another. Then, make sure that you have proper DNS records.

Once, you have clarified all the prerequisites. Let’s go through the ways to merge your accounts.

How to Merge Two Office 365 Accounts? [MS Outlook]

There are no physical options to merge your accounts in office 365. But, with the help of Outlook you can easily combine your account. For this, we first connect our source office 365 account to the desktop application.

  1. Click on File >> Add Account >> New Account options.
  2. Sync your Office 365 accounts into the desktop Outlook.
  3. Select File, then Open & Export and Import/Export button.
  4. Click on Export to a file option and hit the Next button.
  5. Select the Outlook Data File (.pst). Press the Next option.
  6. Choose the folder where your O365 data is contained.
  7. Now, save it to the PST file. Once you download the file, go to the new account option and add your destination Office 365 accounts.
  8. Once you configure your account and go to the Open & Export option.
  9. Click on the Import/Export button. then, select the Import option.
  10. After that, browse the location of your file and then, then Import the file.

So, in this we use MS Outlook to move our data to combine the data from two accounts. If you don’t have an Outlook application, then you can migrate Office 365 tenant to tenant to combine your accounts.

Combine Microsoft 365 Accounts by Tenant-to-Tenant

This method can be difficult to follow, so to simplify the process. We divide these methods in two parts. First part is preparation. In this you have to take certain precautions and prepare the tenant migration process.

  • Make sure that you have global admin rights on source as well as target tenants.
  • You must have enough license to store your data.
  • If you use the custom domain and want to merge that, first remove it from your source tenant.
  • Then, add and verify it to the target tenant.
  • It is advisable to use backup to protect your data.
  • Inform all the users that you are migrating your account.

Now, we are going to perform the migration process, so follow the next part.

Merge Data from One Tenant to Another

  1. In your source tenant Exchange Admin Center. Enable the IMAP by going to the Settings >> Mail flow >> IMAP access >> Enable option.
  2. Click on the mailboxes are accessible via IMAP. Then, enable MFA.
  3. In the target tenant, create mailboxes for all the user accounts.
  4. Assign them Microsoft 365 licenses. Now, we are going to create a CSV containing all the data in it.
  5. In the Exchange Admin Center of the target tenant. Go to the Recipients, then the Migration button.
  6. Select the Add migration batch and IMAP migration option.
  7. Upload the CSV file that you have created and enter the IMAP server settings of the source tenant.
  8. Then, transfer Office 365 data to another account.
  9. Lastly, update your DNS or MX records.

So, here are the methods to merge your two tenants together. This method and the above techniques are free to use. But many users may have issues during the process like unable to sync your account or you need technical expertise to combine the data together. So, to help you in that situation. There is an alternative method that can easily help you.

Combine Office 365 Accounts with Professional Software

This method too has no direct option to merge your two Microsoft 365 accounts. However, with the help of this, you can easily move your entire O365 data to another account without any issues. Not only Microsoft 365 data you can also use this software to merge two OneDrive accounts. The process is simple, just download BitRecover Office 365 Backup Tool, and then follow the instructions below.

Steps to Merge Two Office 365 Accounts

  1. After installing the software on your computer. Enter the email address of the source Office 365.
    enter your office 365 email address
  2. Provide the passwords and log in to the software as an admin.
    provide the passwords
  3. After that, the tool automatically fetches all your data and presents it in front of you. Click on the data to see the content of the file.
    click on the data
  4. Now, choose the Office 365 option from the saving option.
    choose office 365 option
  5. Enter the credential of the destination account. Lastly, click on Backup option.
    click on backup option

Concluding Words

Combining your Microsoft 365 accounts can be a great help. That’s why, in this article we have provided three methods to merge two Office 365 accounts. The first and second methods are manual and free but using them will result in a lot of problems but if you use the professional software then it becomes easier and safer to combine many accounts together.

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