Choose the mailbox from the Address Book.

Click File > Info > Account Settings > Delegate Access.

To grant Send On Behalf permissions, you need to add the user as a delegate for your mailbox in Outlook and assign the delegate any level of access. If the admin excludes a mailbox with Send As permission from the list in HostPilot, Send On Behalf permission will not be removed.

To remove Send On Behalf permission, the end-user must remove the delegate's mailbox from the Delegate Access list in Outlook.

When Send On Behalf permission is granted via Outlook, the Send As option is automatically checked in HostPilot: Services > Mailboxes > click mailbox > Full access & Send as.

If the admin grants Send As or Full Access through HostPilot, it overrides Send On Behalf permissions manually granted via Outlook.

Read the Knowledge Base article on How Do I Enable Send As or Full Access Permissions On An Exchange Account? for more information.

Another type of delegate access called Send As permissions that can only be enabled in HostPilot® Control Panel by the admin of your account.

Emails sent by your delegate will be marked as, 'on behalf of' another user and recipients will see both your address and your delegate's address (as the actual author of the message): Send On Behalf permissions can be manually granted to a user by another user via Outlook.

It does not allow to open or access the contents of the mailbox in OWA or Outlook.

Send On Behalf permission allows a delegate to send messages on behalf of another user. This article describes how to enable Send On Behalf permissions via Delegate Access using Outlook.

Where is the send button on outlook