Send message troubles

[Luminus]

I am trying to create a workflow to send an email using a shared mailbox as the from address and i am getting the following error 

I have verified that I have the ability to send from this mailbox , and that it exists. 

Outlook account: ITHelpdesk@vesservices.com doesn't exist: Microsoft.Flow.RPA.Desktop.Modules.SDK.ActionException: Failed to find Outlook account ITHelpdesk@vesservices.com ---> Microsoft.Flow.RPA.Desktop.Robin.Shared.Runtime.ActionException: Outlook account: ITHelpdesk@vesservices.com doesn't exist
at Microsoft.Flow.RPA.Desktop.Modules.Outlook.Actions.OutlookActions.SendEmailThroughOutlook(Variant outlookInstance, Variant account, Variant from, Variant to, Variant cc, Variant bcc, Variant subject, Variant body, Variant attachments, Boolean isBodyHtml, Int32 sendEmailFrom)
--- End of inner exception stack trace ---
at Microsoft.Flow.RPA.Desktop.Modules.Outlook.Actions.SendEmailThroughOutlook.Execute(ActionContext context)
at Microsoft.Flow.RPA.Desktop.Robin.Engine.Execution.ActionRunner.Run(IActionStatement statement, Dictionary`2 inputArguments, Dictionary`2 outputArguments)

[Onyat]

Try using the display name of the shared mailbox rather than the email address.  For example, if the shared mailbox displays as "IT Helpdesk", use that name instead of "ITHelpdesk@vesservices.com".