XADM: Multiple Private IS Logons for Each User

SUMMARY

In the Microsoft Exchange Server Administrator program, when you choose SERVERS\servername\Private Information Store\Logons, you will see multiple entries for people connected to the servers.

This is by design. The client logs on once for the private store and once for the public store; the spooler logs on once for the private store. The client will also create one additional logon for every mailbox opened as a delegate.