How to Configure an Office 365 Exchange Online Service Account and Import Historical Data

Requirements

• Microsoft .NET Framework 4.5 or 4.5.1 and either the Windows Management Framework 3.0 or the Windows Management Framework 4.0.

• An Office 365 global administrator account to apply permissions and scripts.

• Verify the service account has the following:

  • A mailbox with Microsoft Exchange Online Plan 1 or higher.

  • A mailbox that is not hidden in the Global Address list.

  • A license that supports Outlook (i.e., not a kiosk license).

• Enable RPC over HTTP (RoH) for the mailbox. See also How to Enable RPC over HTTP Connectivity.

Step 1. Connect to Office 365 Exchange Online

1. Install Exchange Online module.
   • If you have already installed Exchange Online module, proceed to the next step.
   • To install Exchange Online module, open Windows PowerShell as an administrator and enter the following command: 
     Install-Module -Name ExchangeOnlineManagement
2. Connect to Exchange Online Powershell and log in with your Office 365 administrator account using the following command:

   • Connect-ExchangeOnline

     For more information on connecting to Exchange Online Powershell, see the Microsoft article https://docs.microsoft.com/en-us/powershell/exchange/connect-to-exchange-online-powershell?view=exchange-ps.

3. After you connect to Exchange Online PowerShell, enter the following command:
   Get-Mailbox -ResultSize unlimited | Add-MailboxPermission -User <ServiceAccount@domain.com> -AccessRights fullaccess -InheritanceType all -Automapping $false

   Permissions are assigned on existing mailboxes only; if additional mailboxes are added to your organization, you must rerun this command. For more information on adding mailbox permissions, see Add-MailboxPermission in Microsoft TechNet. For information on testing mailbox rights, see Get-MailboxPermission in Microsoft TechNet.

Step 2. Import from Office 365 Exchange Online

1. Log into the Barracuda Cloud Archiving Service as the admin, and go to Mail Sources > Exchange Integration.

2. Click Start New Action. In the Select Action page, click Email Import.
3. In the Select Server page, click Add New Server.
4. In the Add New Server dialog box, enter a Configuration Name, the email address for the service account and the service account password.
5. Click Autodiscover.