Shared mailbox issues with Reply All and Sent Items

Hi, I'm an IT technician and we're having some issues with a shared mailbox in Outlook.

We have 5 users working with the same shared mailbox through RDS/terminal servers. Before moving to RDS, it was a regular mailbox with permissions. We converted it to a shared mailbox because Outlook became very slow when accessing it.

Since then:

* **Reply All** automatically includes the shared mailbox itself as a recipient, so users accidentally send the email back to the shared mailbox. * Emails sent from the shared mailbox sometimes appear in the **user's personal Sent Items** instead of the shared mailbox's Sent Items.

Current permissions/settings include:

* Read and Manage * Send As * Send on Behalf * Copy items sent as this mailbox

We also tried changing these settings, for example removing **Send As** or **Send on Behalf**, but it didn't solve the issues.

What is the correct configuration to make sure:

1. Reply All doesn't include the shared mailbox itself. 2. Sent emails are saved in the shared mailbox's Sent Items.

Any ideas?