Jea - Exchange Online - Autoreply

I realized a deployment of JEA with a bastion server.

I would like manage exchange online (set-autoreply) but i have this error when my clients test to start a valid command.
I have a service account autorized on the EAC.

One or more errors occurred.
+ CategoryInfo : NotSpecified: (:slight_smile: [New-ExoPSSession], AggregateException
+ FullyQualifiedErrorId : System.AggregateException,Microsoft.Exchange.Management.ExoPowershellSnapin.NewExoPSSess

I used this command connect-exchangeonline -credential $creds

It’s possible to realize this operation ?

Ressources :
Overview of Just Enough Administration (JEA) - PowerShell | Microsoft Docs

Thank in advance,
Best regards