Migrate Outlook Calendar to Office 365: Outlook Migration
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Written By
Aaradhya Jain -
Approved By
Shivam Rathore -
Updated on
January 28th, 2026 - Read Time
5 minutes
User Query: I am transferring from Microsoft Outlook to Office 365 for work. My Outlook calendar has years of meetings, reminders, and schedules that I cannot lose. How can I migrate Outlook calendar to Office 365 safely without missing any events?
Introduction: Calendars play a vital role in daily work planning. Outlook calendars often contain important meetings, deadlines, and recurring events. However, calendar migration is not always straightforward. Many users worry about missing events, broken reminders, or incorrect time zones. In this blog, you will learn how to import Outlook Calendar to Office 365. We will explain manual options and a professional DRS PST to Office 365 Migration Tool that ensures accurate Outlook calendar migration without data loss.
Why Transfer Outlook Calendar to Office 365?
There are several reasons why users move Outlook calendars to Office 365:
- Centralized access across devices and locations.
- Easy collaboration with teams and shared calendars.
- Better security and cloud backup.
- Real-time syncing with Microsoft services.
- Also, smooth integration with Teams and Exchange Online.
Manual Method to Migrate Outlook Calendar to Office 365
Steps include exporting the Outlook calendar to a PST file and then importing it into Office 365 using Microsoft tools. This process requires technical steps and admin permissions.
Step 01: Export Outlook Calendar to PST
- Firstly, open Microsoft Outlook on your system.
- Click File and select Open & Export.
- Then, choose Import/Export.
- Select Export to a file and click Next.
- Choose Outlook Data File (.pst).
- After that, select the Calendar folder.
- Enable Include subfolders and click Next.
- Choose a location to save the PST file and click Finish.
Step 02: Sign in to Office 365
- Further, open a web browser.
- Log in to your Office 365 account.
- Ensure the mailbox is active and accessible.
Step 03: Upload PST to Office 365
- Access Microsoft’s Office 365 Import Service.
- Afterwards, create a new import job.
- Upload the PST file using the provided upload tool.
- Map the PST calendar to the Office 365 mailbox.
- Start the import process.
Step 04: Verify Calendar Data
- After the import completes, sign in to Outlook on the web.
- Next, open the Calendar section.
- Check meetings, recurring events, and reminders.
- In the end, confirm time zone settings.
Limitations: Manually Import PST Calendar to Office 365
- The process involves multiple technical steps that are difficult for beginners.
- Large calendars with years of data may not migrate completely.
- Recurring meetings can break or duplicate after migration.
- Time zone settings may change, causing incorrect meeting times.
- There is no preview option to verify calendar data before import.
- Moreover, shared calendars often fail to migrate properly.
Best Way to Migrate Outlook Calendar to Office 365
For a smooth and reliable migration, using a professional DRS Outlook PST Migration Tool is the safest option. This dedicated solution transfers calendar data directly without manual effort. It is specifically designed to migrate Outlook calendar items accurately while keeping the original structure unchanged. This tool is highly compatible with all Windows and Mac versions. A free version of this tool is available to evaluate its features and performance. You can convert Outlook PST to EML and other formats, including File Formats and Email Clients.
Simple Steps to Migrate Outlook Calendar to Office 365
- Download and install the DRS Outlook PST Converter Software.
- Now, choose “Select Files” or “Select Folder” to add your PST file.
- Preview and choose the PST calendars to convert. Click Next.
- After that, pick Office 365 as the Saving Format from the list.
- Write your Office 365 credentials, such as ID & Password, to Sign In.
- Lastly, apply advanced features/filters as per your needs. Click Convert.
Real-Life Scenario: Migrate PST Calendar to Office 365
A US-based consulting firm moved its email system to Office 365. Employees relied heavily on Outlook calendars for client meetings and project deadlines. Manual migration caused missing events and scheduling issues. After using a professional Outlook calendar migration tool, all calendars were transferred successfully. Meetings appeared correctly in Office 365, and daily operations continued without disruption.
One-Time Outlook Calendar Migration Service
A one-time migration service is available for users who want expert help. Professionals move your Outlook calendar to Office 365 safely and quickly. No software installation is required. All meetings and reminders remain intact. Your data stays private and is not stored after migration.
Conclusion
You can use the manual method and a professional tool to migrate Outlook Calendar to Office 365. The manual method is free to use and is only used to import a small number of Outlook calendars. However, this method has several limitations that make it an unreliable choice for many users. So, it’s highly recommended to use the professional tool. It supports bulk conversion with multiple advanced features.
Frequently Asked Questions
Ans: Yes, Office 365 supports Outlook calendar migration. You can import calendar data using PST files through Microsoft’s import service or migrate it directly using a professional migration tool.
Ans: You can migrate the Outlook calendar by exporting it to a PST file and importing it into Office 365 manually. For a simpler and safer process, a professional Outlook PST to Office 365 migration tool can transfer calendar data directly.
Ans: Yes, it is possible. A professional DRS Migration Tool allows you to migrate Outlook calendar data from PST files without requiring Outlook to be installed on your system.
Ans: Admin access is required only when migrating data to Office 365 accounts that need permission approval. For single-user migrations, standard Office 365 login credentials are usually sufficient.
About The Author:
I, Aaradhya Jain, a technical content writer at DRS Solutions, specializes in delivering clear, practical guides on data management, migration, and recovery tools. With a detail-oriented and user-first approach mindset, I transform complex processes into actionable insights for IT professionals and decision-makers.
