Sardar Agabejli's questions

We have some migrated sharedmailboxes on a exchange online mailserver. When users get access to one of these mailboxes via mailbox delegation setup, these mailboxes do not appear automatically in their outlook.

I know there is a powershell script for enabling automapping for a single user for a mailbox.

Get-Mailbox "SharedMailbox" | Add-MailboxPermission -User UserXYZ -AccessRights FullAccess -AutoMapping:$TRUE

But is there a script or a setting, to enable automapping as a default for a mailbox? So that all users, also new user that get access to the mailbox, will automatically get it displayed in their outlook?

Is there a way to use azure MFA (using the Authenticator App) for Windows 10 Desktop logins? The goal is that users, who login on a Domain PC, need to authenticate via the Microsoft Authenticator App for every login on the PC. I know there is a similar question that is two years old. It says that it was not possible at that time. Otherwise there are articles that say it is posible using azure hybrid join. Our Domain environment consists of 50 Domain PCs. We have our AD Users synced to Azure but not the PCs yet. What is the best way to achieve the goal? Is that even possible? Thank you for your help!