Exchange 2007 App eventlog is getting Full from these alerts. All the accounts that a referenced are disabled accounts. I did add "Self" as "Associated External account" but still the same error. The users have to be disabled so enabling them is out of question. Why is the HUB server computer account trying to logon to this mailboxes ? Log Name: Application Source: MSExchangeIS Mailbox Store Date: 2/11/2010 7:35:40 AM Event ID: 1022 Task Category: Logons Level: Error Keywords: Classic User: N/A Computer: <servername> Description: Logon Failure on database "<dbname>" - Windows account <HUB servername>; mailbox <mailboxname>. Error: 1245 Client Machine: <HUBSERVER> Client Process: edgetransport.exe Client ProcessId: 0 Client ApplicationId: Client=Hub Transport

In the past when I have seen this issue it is because the accounts that are disabled are above the mailbox size limits. You might want to check the size of the mailbox and see if it is over the size limit set. If it is you will need to remove the size limit for those mailboxes or give yourself full control of the mailbox and remove some of the emails. If this does not fix your issue please let me know. Chris cbfive.com

Hi,This event is purely because of the disabled accounts. unless you enable them or add "Self" as "Associated External account" it will be keep on coming. Instead you can enable the Account and disable the mailbox in Exchange system manager.

Hi,Similar post, please have a look:http://social.technet.microsoft.com/Forums/en/exchangesvradmin/thread/617f2ace-b897-474a-bd97-9fefb1bf879aFrank Wang