A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Use this for Full access permissions:
Get-Mailbox -RecipientTypeDetails UserMailbox,SharedMailbox -ResultSize Unlimited | Get-MailboxPermission -User vasil
For Calendar permissions, is a bit more complicated. This is a simple example that will work most of the time, but will fail on any localized folder:
Get-Mailbox -ResultSize Unlimited -RecipientTypeDetails SharedMailbox | ? { Get-MailboxFolderPermission "$($_.PrimarySmtpAddress):\Calendar" -User vasil -ErrorAction SilentlyContinue }