Home > CiraHub Support > How to two-way Sync a GAL and Exchange Server Contacts

This article will outline how to two-way Sync a GAL and Exchange Server Contacts. CiraHub consolidates numerous data sources from multiple platforms ensuring that the information remains consistent across devices and software.


  1. First, Log in to CiraHub. You will be taken to the onboarding wizard. (See figure below.) Next, select the object you want to sync. In this example, the contacts object has been selected. Prior to setting up the Hub and Spokes in CiraHub, you will need to set up an Office 365 account with the Global Admin role. You will need this to set up and grant access permissions as requested by Microsoft.  Hub and Spoke Setup
  2. Next, start the Hub and Spoke setup. Click on “Office 365 in my tenant”, then Select Global Address List as the source type for your contact spoke. Users will need to have an Office 365 account with the following Exchange Online roles granted via PowerShell: Address Lists, Mail Recipient Creation, and Mail Recipients permissions which will act as a Service Account to run the GAL sync. This account does not need to have an Office 365 license, and this is required for each tenant added to the Hub.
    Select Global Address List

3. There are two authentication methods – Credentials and Certificate based. Select Credentials and sign in with your Microsoft Admin Account’s Login and Password Information for the GAL Connection.“Select” Credentials and Re-Enter your Microsoft Account

4. Next, the Microsoft Sign-in page will appear. Provide the Email and Password to your account.Sign in with Microsoft

5. Click Accept to give CiraHub access to your Microsoft Account. You should always leave the “Consent on behalf of your organization” box unchecked when you sign in for the first time. This option lets other users under the same domain access this Hub if they log in using their company email address. A user would not have access to this Hub, but they would be able to log in and create their own hub. Give CiraHub Permission to Microsoft

6. Select Credentials and re-enter your Microsoft Account Login and Password Information for the GAL Connection.Validate GAL

7. Wait for CiraHub to validate the connection to the GAL after entering the Microsoft Login and Password.Select Authentication Method

8. With the Certificate Authentication method, you will be prompted to either “Automatically Generate a Certificate” or you can choose to Import a PFX Certificate File and enter your password.Certificate Authentication

9. Enter your Microsoft Global Admin email address. CiraHub will then store your account information in the Microsoft Azure Vault when it is synced from Powershell.Enter Microsoft 365 Email

10. Lastly, you will need to wait for CiraHub to Install Certificate-Based Authentication for the GAL connection and then click Next. Install Certificate

11. Type in a Spoke Name and click Next.  

Add Gal spoke name

12. Type in a Hub Name and click CREATE. exchange server hub name

13. Click the +Spoke button to add an additional Spoke, then select An Exchange Server as the source type of the new Spoke.

Exchange Server Select User Mailbox

14. Enter your Exchange Server Connector Login, Password, URL, and Exchange Version. If you are running an Exchange Server Version dated 2016 or later, always select Exchange 2016 in your Connector Settings. Click here for more information on How to Find your Exchange Server settings. Connector Settings

15. Wait for CiraHub to Validate your Exchange Server Settings in order to access your data. Exchange Server Validation

16. Select the Mailbox Folder you would like to sync.  Select the Mailbox Folder you would like to sync.  

17. Type in a Spoke Name and click Next.  exchange server spoke name

15. On the CiraHub Dashboard, click on each of the Spokes, select Sync Options, then Allow the Hub to create and sync items in this spoke, and click NEXT. This will enable 2-way synchronization between the Hub and your spoke.

  1. allow hub to sync

16. Click “Sync now” to enable 2-way synchronization between the Spokes and the Hub you have created. You can also modify the sync options for each of your Spokes. 

2-way Synchronization

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. For more information check out the FAQ page and our CiraHub Onboarding Guide.