Migrate Emails from Aruba to Office 365 Successfully in 2026

How to Import Emails from Aruba to Microsoft 365?

The manual IMAP import option is available, or you can use the professional migration tool to make the transfer. However, for a secure and hassle-free manual migration, you must fulfill the following prerequisites:

• IMAP must be active on your Aruba Mail account. Note that if your account is created after June 2017, IMAP is automatically enabled. 
• Check and maintain your Aruba email server settings and credentials altogether. 
• Prepare your destination M365 account by adding custom domains in the Admin Center. 
• Verify ownership with TXT records offered by Microsoft DNS settings at Aruba. 
• Create user accounts mapping Aruba and Office 365 users and assign them proper licences. 

Hands-On Migrate Mailboxes from Aruba to Office 365

We will discuss two different methods here: one using Microsoft 365 Admin Center and another via Outlook desktop. The stepwise guide for both methods is discussed completely as follows. 

Method 1: Via Microsoft Outlook 

If you only have a few mailboxes (1-2) and an active Outlook profile connected with Office 365, then these steps can help you out:

1. Launch the desktop Outlook and go to the Add Account option. 
2. Using it, add your Aruba Mail account to Outlook and configure it. 
3. Further, export the Aruba emails to a local PST file. 
4. Use Import/Export from Open and Export in File to save Aruba emails. 
5. Later, using the same Import/Export wizard, move PST emails to Office 365. 
6. Or, you can simply drag and drop the emails if the configured mailboxes sync data well. 

This way to migrate emails from Aruba to Office 365 is available, but not suitable for lengthy migrations. Also, it is not necessary that the emails will be moved securely, or you can drag and drop each email appropriately without duplication. 

Method 2: Through MS Admin Center 

This method of free migration is convenient for tech-savvy users without requiring additional software installations. It will pull all your email data from Aruba mail servers to Office 365 (now Microsoft 365). Steps are:

1. Prepare Aruba IMAP Mail settings as provided here:

Incoming Server: imap.pec.it (for Certified Mail / PEC)  or imap.aruba.it (for standard Aruba mail) For Outgoing Server, use smtp.pec.it or smtp.aruba.it Port: 993 with SSL/TLS Security and Your full Aruba email address and password

2. Next, prepare a CSV file for mapping source Aruba accounts to target Office 365 accounts with these columns:

Office 365 email address, Aruba email address, and Aruba email password

3. Once done, sign in to the Microsoft Exchange Admin Center or Purview Portal. 
4. Then, create a new Migration Endpoint and choose IMAP as the source with Aruba credentials. 
5. Furthermore, go to Migration and click on Migration Batch. Tap +Add. 
6. Afterward, opt for Migration to Exchange Online and again pick IMAP. 
7. Next, upload the earlier created CSV file and select the migration endpoint. 
8. Set the target delivery domain, name your migration, and tap Start Migration to execute the batch. 
9. The process runs in the background, and you can check the transfer Aruba emails to Office 365 progress in the dashboard. 
10. Once sync completes, run incremental sync to identify that no emails are left, and finally, update DNS MX records on Aruba’s portal. 

Tip: Updating MX records is essential to route the Aruba Mail flow to Office 365 directly. Also, this process via Admin Center is the same whether you want to migrate BT emails to Office 365, Aruba, or any other.

Shortcomings of the Method:

• You can only migrate 500,000 items per user’s mailbox via Admin Center. 
• Attachments, calendars, contacts, notes, and tasks aren’t migrated or may be hampered. 
• The largest size for a single email message migration is allowed upto 35 MB. 
• You can use PowerShell commands for Admin Center migration, but it is even more complex and time-consuming. 
• Both methods aren’t effective for very large enterprise-grade migrations. 

Tool-Based Migrate Emails from Aruba to Office 365

A comprehensive, risk-free migration is executed when you use a dedicated solution like the SysInfo Mail Migrator. It is built with advanced algorithms to handle complex structures and securely transfer all emails, contacts, calendar, and other data within one or more Aruba mailboxes at once. With smart features and filter options, it securely works across all Windows OS to instantly migrate Aruba email to Gmail, Office 365, or others with no loss or downtime. 

Steps to Import Emails from Aruba to Microsoft 365

1. Launch the Email Migration Tool and click IMAP from the Dashboard. 
   
2. Then, choose Single or Batch login, enter credentials, test the connection, and hit Continue. 
   
3. Further, expand the tree hierarchy to check all the folder details and email count. Select to migrate and tap Continue. 
   
4. Now, pick Office 365 from the email clients, select Single/Admin login, and tap Add Connection. 
   
5. Sign in to the target Office 365 account and apply the filters before migration. Tap Next. 
   
6. Finally, tap Continue when prompted and check real-time migration progress and success in the Dashboard. 
   
   

You can even get a complete, detailed report for the entire process through the All Reports section. Try a pilot test with the Demo Version of the software for evaluating performance and features while saving a few files at no cost. Moreover, once the migration is complete, you can verify that all your emails, contacts, attachments, calendar events, notes, tasks, etc. are present within Office 365. 

What You Must Know About Aruba PEC?

Aruba’s Certified Electronic Mail Service (PEC) for Italian companies (e.g., Postecert) has its own legal requirements and technical specifications. IMAP/Port 993 could be configured as a way of accessing PEC; however, it doesn’t migrate to IMAP normally and can result in complications with PEC compliance. Therefore, for PEC mailboxes, either create a separate account for accessing mail via Microsoft Outlook or better go for the professional software like SysInfo, supporting access to all Aruba mailboxes without the need for any special strategy.

We have come to the end of this migration guide and must go through the common benefits we achieved from this migration, too. 

Transfer Aruba Emails to Office 365: Advantages 

• Improved collaboration
• Access to Microsoft 365 Suite (Outlook, Teams, SharePoint, OneDrive, etc.)
• Enterprise security (MFA, Spam control, Data encryption, and more)
• Cloud-first platform scalability 
• 99.9% uptime reliability by Microsoft 
• Global access across platforms and devices 

Final Remarks 

For multiple organizations, it is still a task to migrate emails from Aruba to Office 365 securely. However, with the right methodology, nothing is complex or difficult. You can have a hassle-free email migration for a few files with data security using the manual Microsoft Exchange Admin Center. But for more than a few files with MBs or GBs of data across several mailboxes, opt for the SysInfo Mail Migration Software. With an efficient solution, you can easily preserve emails without duplicates and optimize the costs and productivity of your business.

Frequently Asked Questions

About The Author:

Simran Bhatia

Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms.