Home > CiraHub Support > Calendar Sync > How to Enable Calendar Sync Between an iCal and a Office 365 Mailbox

This article will outline how to sync iCal with O365 User Mailbox Calendars. CiraHub consolidates numerous data sources from multiple platforms ensuring that information remains consistent across devices and software.  


1. Log in to CiraHub. On the Hub & Spoke Setup page, select the Calendars object. Keep in mind that public folders can sync both contacts and calendars (See figure below.) Check out this article to learn how to use CiraHub’s Calendar Sync options.

Hub and spoke setup

2. Next, select the source type of your Calendar spoke and click NEXT (See figure below.)  

Selecting a Spoke Source

3. On the iCal URL page, enter your iCalendar credentials and click NEXT. (See figure below.) 

Adding your iCal URL


Only iCal links ending in the .ics format are valid. Always check for the file extension to allow you to sync Calendar items from that source on CiraHub.  

4. Create a name for your first Spoke and click NEXT. (See figure below.) 

Naming Your Spoke

5. Next, choose a name for your Hub and click CREATE.  (See figure below.) 

Naming Your Hub

6. On the CiraHub dashboard, add a User Mailbox using the +Spoke button and click NEXT.   

Adding a User Mailbox Calendar

7. Select the Mailbox Folder you want to Sync, choose a Calendar and click NEXT. (See figure below.) 

Choosing a Mailbox Folder

8. Name your Mailbox Folder Spoke and click CREATE. You should now see two spokes connected to the Hub on the CiraHub Dashboard. You can add more spokes as required.  

Naming Your Name your Mailbox Folder Spoke

9. Next, click on the Mailbox Spoke, go to Sync Options and click Allow Hub to create and sync items in this spoke and click SAVE (See figure below.) Note that the iCal spoke is a “Read-Only” spoke that allows for one-way sync from the Hub. This means that CiraHub can read but not write or push any information to it.  

Allowing The Hub to create and sync items in the spoke

10. On the CiraHub Dashboard, click Sync Now to Sync iCal with O365 User Mailbox Calendars. You can also edit sync for each of your spokes using the options at the bottom of the page.  

Syncing Calendars On CiraHub Dashboard

Learn More About CiraHub!  

CiraHub is a two-way sync platform for shared contacts and calendars for Microsoft Office 365, Exchange Server, and other Microsoft Enterprise Applications users. The software is designed to make it easy for people lacking IT expertise to set up shared contact and calendar sync for their company.  

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