OST files are the backbone even though you are working with outlook E-mail Client and Exchange server. These files store all the user mailbox data and maintain it synchronized with exchange database. If the connection to Exchange server isn’t accessible, then it gives users the capability to work offline. Anytime the Exchange connection is brought back its content material and the modifications created automatically gets synchronized with Exchange.
While you are working in offline mode, you can compose and send emails. The sent mail is stored in the offline outbox, after the connection is reestablished the mail will be sent. The OST file information} and the exchange server will get synchronized then, and the exact same changes will be reflected to each databases (i.e. the OST file and the Exchange EDB database).
What will happen if the OST file isn’t able to get synchronized with the Exchange server?
The most common factor that leads to the Exchange to Exchange in availability or an oversized OST file. In such situation either the Outlook starts troubling and prompting various error messages on the screen.
About OST file size:
The OST file location for various operating systems varies:
For Windows 95, 98 and ME:
C:\Windows\Profiles\user name\Local Settings\Application Data\Microsoft\Outlook
For Windows NT, 2000, XP and 2003 server:
C:\Documents and Settings\user name\Local Settings\Application Data\Microsoft\Outlook
C:\Documents and Settings\user name\Application Data\Microsoft\Outlook
For Windows XP:
Just like OST file location, the OST file size also varies for various Outlook versions.
Default maximum OST/PST file size limit for various Outlook versions:
Outlook 2002 and earlier versions 2 GB
Outlook 2003 and 2007 20 GB
Outlook 2010 50 GB
As you keep on working with the OST file, it keeps growing in size day by day. You must keep a check on your OST file so that you can rescue it from getting oversized.
There are some symptoms that occur when your OST file size exceeds the limit. The user will not be able to open or load the OST file, Mail operations cannot be performed, no new data can be added to the OST file, and OST file couldn’t be properly synchronized with the Exchange server and various error messages are prompted on the screen indicating the failure of the OST to Exchange synchronization process.
At the beginning, the increasing OST file size can lead to troubles while performing daily mail operations such as composing, sending and receiving emails etc. But later on it can lead the user to serious data loss situations and major data corruption issues.
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