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Written By
Suman Rawat -
Approved By
Sonika Rawat -
Updated on
August 21st, 2025 -
Read Time
6 minutes
Handling scheduled meetings and projects is perplexing enough in an already messy calendar. For example, when working with project stakeholders, you may use Google Calendar, use Apple Calendar for meeting invites, and manage team meetings in M365. With this, you can end up with a complex schedule. Hence, you need to import ICS to Office 365 to avoid missing events and organize all your schedules and meets. This guide provides some manual solutions and an ICS Converter for efficient import with a new way to look at it.
Most blogs state “ICS files are useful to transfer events”, but what they leave out is that ICS files can be less reliable than they appear. Depending on what platform you use to generate the ICS file from (Google, iCal, Thunderbird, etc.), there could be:
Being aware of these hidden issues before the import process will streamline the migration and prevent potential scheduling issues.
User Query:
“I exported my Apple Calendar as an ICS file. But when I imported it into Office 365, duplicates were created, and a few didn’t show up at all. How can I import them correctly without losing data?”
This is a common concern for every user migrating from other calendars to Office 365. Let’s find the methods that can help with an easy, quick, and swift import.
There are three manual methods that are suited for this import. It involves the use of the Office 365 native email application, i.e., Outlook, too. Below you can find the detailed steps for these methods.
Note: If you want to test the handling of ICS across all platforms, go through the process to import ICS to Google Calendar. You can do it before migrating everything to Microsoft 365 for cross-reference.
Do You Know?
There is even an alternative process to import ICS file to Office 365, suited for manual bulk imports. The steps for it are:
There are various reasons why manual methods are not feasible in all situations and fall short. You can get to know about it by:
Manual imports work, but fail when importing ICS files with large file sizes from multiple sources. Or those with recurring schedules and large attachments. SysInfo ICS Converter here offers dedicated features to:
Tip: These are particularly helpful to enterprise teams that manage a wealth of shared schedules.
Import ICS to Microsoft 365 Calendar-Fast Procedure
Import ICS to Office 365 from even the simplest manual method can lead to errors. Bringing together all your multiple schedules in one place is more than simply ease of planning. It allows teams to easily collaborate without confusion because all the schedules are in the Office 365 suite. If you regularly move between multiple platforms, then using the professional tool could lead to very successful outcomes.
Ans- ICS (Internet Calendar and Scheduling) File is the standard for calendars. It contains details of all the events, schedules, meetings, and more. This file format is supported by almost all calendars, like Outlook, Google, Apple Mail, Mozilla Thunderbird, etc.
Ans- The best way is to use the ICS Import Tool. It has simple and easy-to-use steps with an intuitive interface. Moreover, bulk imports with no loss are possible within some time.
About The Author:
Suman Rawat is a technical content writer and expert in the fields of email migration, data recovery, and email backup. Her passion for helping people has led her to resolve many user queries related to data conversion and cloud backup.
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