This page describes on how to use Outlook Web auto forward emails from a sharing account to one or multiple accounts.
Under View tab, select View setting.
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Navigate to Mail - Forwarding - check Enable forwarding and input an email address.
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Don't forget Save before closing this window. Now all emails sent to this sharing account should be forwarded automatically to a specific account.
If you want to add a second or third receiver of this sharing account, add a rule.
Still using Outlook Web, Navigate to Mail - Rules. Give the rule a name, like Forward to Allen.
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Select Apply to all messages in Add a condition.
Select Forward to and input an email address.
Click Save and all emails will also be forward to the account.