Migrate AWS WorkMail to Office 365 Using Technical Tips
Published: May 20th, 2025 • 7 Min Read
Many players provide business email communication, one of which is Amazon WorkMail. This WorkMail has a close integration with the most popular cloud computing platform, i.e., none other than Amazon Web Services. This makes WorkMail quite popular among businesses. However, WorkMail still lags in key areas, such as having a communication and collaboration tool at the same level as MS Teams. Meanwhile, Office 365 not only has Teams but also SharePoint, OneDrive, and much more, all at a competitive price. So many users wish they could migrate AWS WorkMail to Office 365 environment, but technical challenges prevent them from undergoing the process.
No need to worry, we are here to provide you with the techniques that make it very easy to transfer any amount of WorkMail data to an M365 account. Let’s first figure out the prerequisites for the process.
Prerequisites of A Successful AWS WorkMail to Office 365 Migration
If preparation is done in the right way, you will encounter little to no issues during the actual migration. Therefore, it becomes all the more essential to configure the settings carefully. Below is a list of things that need to be sorted out beforehand.
- Directly add the Amazon domain name for your IMAP business to your Microsoft 365 account as an accepted domain.
- After the domain confirmation is successful, attach users to the Office 365 service so that an endpoint is available for the data transfer.
- Now, create a migration CSV file containing the username, email ID, and password of all users.
- Find and save the FQDN of the current IMAP server and make changes to the firewall settings to allow multiple IMAP connections. Then, increase the number of connections for your IMAP server.
- Get admin account-level permissions to freely retrieve the data of all mailboxes that exist within the IMAP server.
Now it’s time for the manual technique to perform the migration task.
Manually Migrate AWS WorkMail to Office 365
Be sure to adhere to the following instructions to avoid any complications during migration.
- Visit the New EAC (Exchange Admin Center) on any browser.
- Go to “Migration” and press “Add migration batch”.
- In the Add migration page, enter a new name. “AWS WorkMail to Office 365”.
- Pick “Migrate to Exchange Online” in the dropdown list, select the path, and hit “Next”.
- In the AWS WorkMail to Office 365 migration type dropdown, select IMAP.
- Check the “Prerequisites for IMAP migration page”. Fix all issues and press Next.
- Select the “Create a new migration endpoint” option and press Next.
- Type a suitable name like”Test-Amzn-Office” and hit ”Next”.
- In the IMAP migration configuration page, type the source server name and configure other details. After that, press Next.
- When “new endpoint created” flashes hit “Next”.
- Download, edit, and upload a CSV file of user mailbox data using the interface, then press “Next”.
- Avoid changing anything on the “Select configuration settings” page; just press the “Next” button and proceed to migrate AWS WorkMail to Office 365.
- Once you get to the “Schedule batch migration” page, create a start point as well as an end point for the current migration batch, and save.
- Verify before pressing “Done”.
- Get the status of the “Batch” in the “Migration” section of the main menu of EAC. Keep a tab on any user-end queries as well.
- Make changes to the MX record so that it points towards the new destination. Once done, remove all traces of it from the original server.
- Finally, end the migration batch request from the EAC.
Source: Migrate other types of IMAP mailboxes to Microsoft 365 or Office 365
Another way users can migrate AWS Workmail to M365 on their own without admin intervention is through export import technique. Here are the steps.
Migrate Amazon Workmail to Office 365 via the Outlook Classic’s Export Import Feature
1. Add AWS WorkMail Account to Outlook:
- Go to File > Add Account. Enter your AWS email, select “Advanced options,” then “Let me set up my account manually,” and choose “IMAP.”
- IMAP Settings:
- Incoming: imap.mail.[your-aws-region].awsapps.com, Port 993, SSL/TLS, check “Require logon using SPA.”
- Outgoing: smtp.mail.[your-aws-region].awsapps.com, Port 465, SSL/TLS, check “Require logon using SPA.”
- Click Next, enter your AWS password, and click Connect, then Done.
2. Add Office 365 Account to Outlook:
- On the same account, added successfully. Enter your Office 365 email. and press Next. Outlook auto-detects settings.
- Enter your Office 365 password, sign in.
- Complete any device management prompts. Click Done.
- Restart Outlook.
3. Export AWS WorkMail to PST:
- Go to File > Open & Export > Import/Export.
- Choose Export to a file.
- Then Outlook Data File (.pst).
- Select your AWS WorkMail account, ensure “Include subfolders” is checked.
- Browse to save the PST file (e.g., aws-export.pst). Then, click Finish
- Keep the option to set a password as blank and hit OK.
4. Import PST to Office 365 Account:
- Again, go to File > Open & Export > Import/Export.
- This time, choose Import from another program or file.
- Then Outlook Data File (.pst).
- Browse to your saved aws-export.pst file.
- Select the top folder to import, and ensure “Include subfolders” is checked.
- Then, choose “Import items into the same folder in:” and select your Office 365 account from the dropdown.
- Click Finish.
A more useful way to avoid the confusing manual approach is discussed in the next section.
Professional Tool for Amazon WorkMail Migration
The market is filled with tools claiming to be the best webmail migrator. However, the reality is that most of them lack the fundamental features that make SysTools IMAP to Office 365 migrator what it is. Complete with a feature-rich UI that enables even nontechnical users to transfer their webmail data.
Go over the quick steps and understand how the tool works.
- Choose the Source and Target (IMAP, Office 365).
- Validate the source and target credentials.
- Upload user data in CSV format.
- Pick users & hit Start Migration.
Detailed Steps to Use the Utility
Here is a precise list of steps that users need to follow if they choose to use the tool
Step 1. Download, install, open, and choose IMAP as the source and Office 365 as the target.
Step 2. Then, in the Workload section, mark the box next to emails and set up a time period using the Date filter.
Step 3. After that, visit the Source Tab and choose Other in the IMAP Server name. Fill in the rest of the details before hitting Next.
Step 4. Fill in the Admin email and Application ID for Office 365, then validate and press Next.
Step 5. Edit the template present in the tool and upload the CSV file. Otherwise, directly upload the file containing User data in CSV format.
Step 6. Validate all Selected Users and hit the Start Migration button to begin the movement of data.
Advanced Features of the Software
Some of the key features that make the tool a market leader when it comes to AWS WorkMail to Office 365 Migration are given below.
- A seamless user experience that is made better with robust algorithms.
- Advanced Date filtering capabilities to migrate the data of your choice.
- Automatically get a summarized and detailed report of the entire process.
- Move up to 20 users’ data simultaneously.
- No hidden subscription fees, get the entire tool with a single purchase.
- Get 24×7 support for all queries regarding the tool.
Conclusion
This article is now complete with all the details required to successfully migrate AWS WorkMail to Office 365. The prerequisites as well as the complete manual method are clearly explained. Furthermore, professional utility is mentioned to avoid the difficulties associated with manual data transfer.