Migrate/ Import ICS to Office 365

How to Migrate/ Import ICS to Office 365 – Add Calendar Files to OWA

An .ics file is the most commonly used file format to store all the calendar data files. It is utilized by various email clients like MS , , etc. However, as the cloud-technology is in demand; many people are migrating to the cloud. Hence, the users keep looking to solutions to effectively import ICS to Office 365. In the following discussion, we will discuss how to import an .ics file into OWA (Office 365).

Need to Add/ Import ICS File into OWA

When we keep our eyes on Office 365 then, it is the most used platform in organizations whether it is big or small. Therefore, the reasons which support to import ICS file to Office 365 are as follows:

  • Office 365 has simple as well as user-friendly interface, the most important thing is that it has the whole MS Office suite within it, which makes easy for the usage.
  • It can be used anywhere as well as anytime without having any dependency on the platform.
  • Since ICS is supported on various platforms, it inclines to be the most appropriate way to add/ migrate calendar to Office 365.

Users Queries to Migrate/ Import ICS Calendar to Office 365

Depending upon the sum of .ics files the process to move/ import ICS file into OWA varies. Therefore, in such segment of the article, various solution to migrate/ upload single as well as multiple .ics calendar files are discussed.

Manual to Import ICS to Office 365

  1. Firstly, Login to on the web account by entering the credentials.
  2. Now, click on the navigation bar → choose App Launcher → choose calendar option.
  3. In Calendar choose New down arrow → choose option of Add calendar.

    Add calendar

  4. Select an option the From file → Browse an ICS file.

    Select the .ics file which you want to import

  5. Click on Open → choose down arrow.
  6. Select calendar type → Save button

Manual to Migrate/ Transfer Multiple .ics files into OWA

To import ICS files to OWA account, there is no direct method available. First, a user needs to convert ICS to file format and then store/ save to OWA. Now, to convert ICS to file format, follow the three simple steps given below:

Step 1: Move/ Save ICS file into MS

  1. Firstly go to the stored location of .ics files on your machine.
    The default location of ICS file is:

    Select the path where .ics file is present

  2. Now, select an option of Import iCalendar or vCalendar → click Next to continue.

    Select Import iCalendar option

  3. Browse the file from the stored location.

    Select file

  4. Click on option of Import from the pop-up window to start the procedure.

    Select import option

Step 2: Store/ Copy ICS file in file format

  1. Select file type to save .ics file.

  2. Browse the data from stored location → click finish.

  3. Choose the desired files from default location.

  4. Now transfer/ save the PST data file to Office 365.

Limitation of Manual Procedure to Import ICS to Office 365

Manual solution to migrate/ import ICS calendar to Office 365 calendar is free of cost but it sometimes fails because of some limitations. This procedure is very lengthy as well as complex to perform. There are more chances of data loss by using this process. It requires proper technical knowledge to perform this process.

Quick & Easy Way to Migrate/ Import or Add ICS to Microsoft Office 365

Since the manual method is free, it demands more time, technical expertise, and involves higher risks of errors or data loss. On the other hand, opting SysTools Office 365 Import tool ensures a smoother, quicker, and more secure migration of ICS files into Office 365, offering convenience and peace of mind to users seeking a reliable and efficient solution. Follow the below guide for the same.

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Step 1. Download and Activate SysTools Import Tool: If the software is not activated, then refer to the Help section via the "Help" button on the start screen for activation.

tool window

Note: You can also activate the demo version to check the working of this software. The demo version of this software imports ICS to 2 user accounts.

Step 2. Source and Destination Setup: Choose "File System" as the source and "Office 365" as the destination migration platform. tool window

Step 3. Workload Selection: Opt for the Calendar option to set the import workload.

tool window

Step 4. Source Folder Configuration: Select the folder path with ICS files. Organize these files into folders named after target Office 365 email IDs. Use "Validate" to check permissions.

tool window

Step 5. Validation of Source Permissions: Ensure correct permissions are assigned and proceed.

tool window

Step 6. Destination Setup: Enter Admin Email and Application ID details carefully. Validate permissions for Office 365.

tool window

Step 7. Permission Granting: After validation, permissions will be granted to the source user. Proceed.

tool window

Step 8. User Management: Add users from the source account via "Fetch Users," "Import Users," or "Download Template."

tool window

Step 9. User Selection: View the user list, search, and select specific users for import. Use the toggle bar for user display.

Step 10. User ID Mapping: Map source and destination IDs manually or using a CSV file. Click "Validate" to authorize selected user source accounts.

tool window

Step 11. Initiating Import: Upon successful validation, click "OK" and then "Start Import" to begin the import process.

tool window

Step 12. Process Initiation: The software conducts a license quota check. Click "Start" to initiate the final import process.

tool window

Frequently Asked Questions

Can I upload/ import ICS to Office 365 in batch/ bulk by using manual way?

Yes, you can perform by firstly converting the bulk iCalendar files into and then, you can migrate/ upload data files into Office 365.

How much time does the manual way take to perform to move/ import ICS file into OWA?

The manual process consumes some time as it depends on the number of .ics files you want to transfer/ move.


Several times users seek efficient methods to import ICS files into Office 365, which becomes crucial for managing and accessing meeting details within calendars. While we've explored manual techniques for importing .ics files into OWA (Outlook 365), the process can be intricate, time-consuming, and pose risks of data loss.

On the other hand, leveraging specialized tools like the above-mentioned tool offers a streamlined and secure approach. This software simplifies the migration process, ensuring a smooth transition of ICS files into Office 365 calendars.