365 Get Shared Mailbox Info

Get-Mailbox -RecipientTypeDetails SharedMailbox -ResultSize:Unlimited `
| Select PrimarySmtpAddress,Alias,DisplayName `
| sort displayname `
| select-object PrimarySmtpAddress, DisplayName, @{
	Name = "Users With Access"; 
	Expression = { 
		Get-MailboxPermission -Identity $_.alias `
		| ? { $_.user -like "*@*" } `
		| select -expandproperty User `
		| &{"$input"} 
	} 
} | Export-Csv .\sharedmailboxes.csv