Expert Solutions to Merge Two Office 365 Tenants

Written By Ashutosh Kumar Jha
Updated on December 5th, 2024

Summary: Generally, business organizations tend to be involved in mergers and acquisitions to expand their business. However, tenant management during such times is a complete disaster, if not executed carefully. It can be referred to as migrating mailboxes from one tenant to another. This write-up below explains how to merge two Office 365 tenants manually. Along with that, an Office 365 Backup Tool is suggested, to secure your files during the merging process.

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Why Combine Two Office 365 Tenants?

Some prominent reasons make it essential for tenants to merge. These are as follows:

The user gets the convenience of accessing the data centrally.
Merging tenants makes data to be secure in one place.
Also, the time and managing costs for multiple tenants are reduced.
Moreover, data consistency is maintained and productivity is improved.

How to Connect Two Office 365 Tenants?

Merging multiple tenants altogether seems daunting, but with the right methods and tools, this task can be smooth and efficient. There are countless benefits to merging two Office 365 tenants as it will reduce the workload and make operating a single tenant easier. You can do this manually or using a professional tool. The step-by-step guide in detail is discussed below.

Method 1: Merge Two Tenants Office 365 Manually

This method involves two stages and is done with the help of the Outlook application.

Stage 1: Exporting Outlook Items to a (.pst) File

This involves exporting emails, contacts, calendars, and more into a PST file. After export, you can Merge Multiple PST Files for importing quickly to another tenant account. Follow the steps to export:

Launch Outlook and sign into the account that you want to merge.
Next, go to File, click Open & Export > Import/Export.
Further, choose Export to a file and tap Next.
Then, choose (.pst) as the file saving format and click Next.
Select the email account to export. Subsequently, select Include Subfolders and click Next.
Now, input the name of the resultant file and specify the saving location. If required, select optional features and click Finish.

Stage 2: Importing Emails, Contacts, and More to Outlook Tenant

Open Outlook and click File, select Open & Export > Import/Export.
Next, choose the Import from another program or file option.
Further, select the Outlook Data file(.pst) and hit Next.
Subsequently, browse and search the downloaded PST file and click Next.
A pop-up box appears. Select the desired Outlook tenant account where you want to merge.
At last, click the Finish button.

Apart from this, you can manually merge two Office 365 tenants using the Powershell cmdlet. However, these manual methods aren’t very reliable and have some cons.

Limitations of Manual Method

Each command must be observed properly. Otherwise, the incorrect action could result in the loss of crucial information.
This approach is time-consuming, lengthy, and complex.
There is no data security and the data might get modified or altered during merging.
Moreover, users must have technical knowledge to complete this task.

An average or novice user may find it frustrating and confusing. So, we suggest using an automated tool as the best, quick, and flexible solution for merging tenants.

Expert Approach to Merge Two Office 365 Tenants

With the rising needs of businesses, using the manual method is quite concerning. However, Office 365 Backup Tool is among the best solutions for effortlessly completing the merging process. This tool has different features that make it a reliable solution such as:

It is highly compatible with all the versions of the system.
Also, it gives an option to remove duplicate mail. Thus, making more space.
Moreover, it has advanced filtering options and saves data in numerous file formats.
Additionally, it allows the export of Office 365 data to multiple email clients.

Steps to Transfer Office 365 to Another Office 365:

Download and install the tool on your system. Run it as an administrator.
Next, click on Backup > Continue. Further, choose Authentication mode, and enter Office 365 tenant account details.
Check the box Assign Impersonation to migrate from multiple tenant accounts, and Sign In.
Choose the User and Mailbox type. Click Next.
Then, select the emails and other files that you want to merge and click Next.
Subsequently, select Office 365 and enter the credentials of the tenant account to which you want to merge. Click Sign in. After authentication, go back to the tool and click Next.
Later, select the optional filters and click Next.
Now, choose the Office 365 ID and mailbox to which you want to merge.
Finally, hit the Convert button.

Conclusion

We have discussed two methods in this write-up above. The manual method can be lengthy and time-consuming. It requires technical knowledge for successful completion. On the other hand, the dedicated tool is interactive and user-friendly. It ensures the maintenance of data integrity while merging two Office 365 tenants. Overall, you can seamlessly merge two Office 365 tenants without hassle.

Frequently Asked Questions

Q. Can I merge contacts between two Office 365 Tenants, rather than combining the entire data sets?

Ans- Yes, you can merge only contacts with the tool. It provides an option to preview the contents, where you can select specific items to export. Follow these steps:
1. Install the Office 365 Backup tool and run it.
2. Click Backup, click Continue > Authentication, input the tenant account details, select Assign Impersonation, and Sign in.
3. Further, choose the User and Mailbox type and click Next.
4. The preview panel opens. Select the Contacts to merge and click Next.
5. Subsequently, select the Office 365 tenant account where you want to merge. Click Next.
6. At last, apply additional filters. Select the mailbox tenant ID and finally hit Convert.

Q. Is it possible to merge Office 365 tenants after merging once?

Ans- Yes, you can merge Office 365 tenants into one place again. It is referred to as tenant-to-tenant migration and involves migrating mailboxes from one or more tenants to another. You can do this manually or use the Office 365 Backup Tool for more convenience.

About The Author:

Ashutosh Kumar Jha

As a content writer with a strong focus on Email Migration, Data Recovery, Email Backup, and File Management, I bring over five years of professional experience. My passion lies in exploring the latest advancements and techniques within these domains, driven by a constant excitement for emerging technologies.