In Easy365Manager, you can remove delegates from “Send as,” revoking access for the chosen user or group to send emails on behalf of the recipient.
Watch a quick video guide here.
You can quickly locate the setting by opening up properties for a user, selecting the Mailbox tab, and clicking on Mailbox Delegation.
This opens up the following form, where you find “Send as” in the top section:

In Easy365Manager, removing delegates from “Send as” corresponds to using the Remove-RecipientPermission PowerShell command.
The PowerShell command “Remove-RecipientPermission” serves the purpose of revoking SendAs permissions for a specified user or group within Microsoft Exchange environments:
Remove-RecipientPermission -Identity lene.hau -Trustee alexander.adams -AccessRights SendAs
This command should be used when it’s necessary to restrict the ability of a particular user or group to send emails as if they were originating from another mailbox. This can be relevant in scenarios where an employee no longer requires delegation privileges to another mailbox or when access rights need to be adjusted due to changes in personnel or security requirements.