I'm about to delete and recreate a mailbox database, however I still see mailboxes in the database
[PS] C:\Scripts\Exchange>Get-MailboxStatistics -Database db01 | ft -a
DisplayName ItemCount StorageLimitStatus LastLogonTime
----------- --------- ------------------ -------------
SystemMailbox{16asdf4-c25b-45d8-bd15-asdf} 1 NoChecking
Microsoft Exchange Federation Mailbox 4 BelowLimit
Microsoft Exchange Approval Assistant 4 NoChecking
Microsoft Exchange 4 NoChecking
Should I be concerned about these mailboxes?
What special actions should I take if any?