Show who has access to your mailbox folders.

How to show who has access to your inbox with PowerShell. 

Get-MailboxFolderPermission -Identity username@domain.nl | fl

This command you will see the users that have rights to your mailbox.

or 

Get-MailboxFolderPermission -Identity username@domain.nl:\”postvak in”

This command you will see the users that have rights to your mailbox.

or

Get-MailboxFolderPermission -Identity username@domain.nl:\”inbox”

This command you will see the users that have rights to your mailbox.

How to remove the user permissions with PowerShell.

Remove-MailboxFolderPermission -Identity user@domain.nl:\ -User “use with permissions”@domain.nl