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- Does quota limts applied on the server disks? If yes, then change the quota limit for account NETWORK SERVICE to Unlimited.
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- Does quota limts applied on the server disks? If yes, then change the quota limit for account NETWORK SERVICE to Unlimited.

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As per what i see in the event logs the reported ID is &quot;System Administrator&quot; mailbox so please check.<br />
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- Rancy
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As per what i see in the event logs the reported ID is "System Administrator" mailbox so please check.

- Rancy

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This error has keep repeating on my exchange 2007 server:<br />
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Logon Failure on database &quot;SG Storage Group\SG Group&quot; - Windows account NT AUTHORITY\NETWORK SERVICE; mailbox /o=labgistics/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Confi<wbr />guration/c<wbr />n=Servers/<wbr />cn=VM023-E<wbr />XCHANGE/cn<wbr />=Microsoft<wbr /> System Attendant.<br />
Error: -2147221231 <br />
Client Machine: VM023-EXCHANGE <br />
Client Process: edgetransport.exe <br />
Client ProcessId: 0 <br />
Client ApplicationId: Client=Hub Transport <br />
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<a href="https://filedb.experts-exchange.com/incoming/2012/10_w40/606751/Error-exch.jpg" target="_blank" title="screenshot (176 KB)"><img alt="screenshot" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2012/10_w40/800_606751/Error-exch.jpg" /></a>
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Error-exch.jpg

This error has keep repeating on my exchange 2007 server:

Logon Failure on database "SG Storage Group\SG Group" - Windows account NT AUTHORITY\NETWORK SERVICE; mailbox /o=labgistics/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=VM023-EXCHANGE/cn=Microsoft System Attendant.
Error: -2147221231 
Client Machine: VM023-EXCHANGE 
Client Process: edgetransport.exe 
Client ProcessId: 0 
Client ApplicationId: Client=Hub Transport 



multiple Logon Failure on database

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.