Both OST and PST files hold importance to an Outlook user. Corruption in any of these will ultimately cause Outlook to suffer. OST file is a backup copy of data available in Exchange Server configured with Outlook with some predefined size limitations. The storage capacity of the file depends on the installed version of MS Outlook application.
|Outlook Version||OST File Size Limit|
|Outlook 2002 and earlier versions||2GB|
|Outlook 2010 and later versions||50GB|
OST file contains all the data you have generated or received since the account is activated on Outlook. It includes all emails (different folders), attachments, calendar schedules, tasks, contacts, notes, hidden items, public folders, etc. When you forget to delete unimportant data, it gets piled up, exceeds the file storage limit and causes corruption in OST file and troubles in Outlook. Large-sized attachments are special to mention for oversized OST file.
Disabling all Add-Ins: Add-Ins in Outlook may disrupt or affect its normal functioning. To improve the performance of Outlook, disabling Add-Ons is a fair option. To perform this, follow below steps –
Archiving OST file data: Archiving OST file data might reduce OST file size and clear some space occupied on the server. You can change archive OST file location in your system. Archiving OST file may prevent your OST file to cross predefined size limit. To archive the file, steps are given below.
Compressing Outlook Data File: OST file size can be reduced using the In-built utility in Outlook. Reducing file size might help in improving Outlook performance provided that user has deleted a number of items. To compact OST file, follow given steps.
The above-discussed methods might help in reducing OST file size or clearing some space on the server by moving these files to a different location. But for large corruptions in OST file, there may be a high risk of losing data. A third-party tool is required to overcome such oversized OST file issue.
Kernel for OST to PST Converter is a useful utility that repairs OST file completely and also converts OST file into PST file efficiently without losing any data. You can download “Trial Version” for free and retrieve your lost or inaccessible data in different formats as per the requirement. Features like In-built search option, smart filters, splitting PST files, a complete preview of file and File Analysis report can be utilized through this utility. The user can make use of another remarkable feature Saving snapshot of the current process for future use by buying a “Full Version” of the utility.
Read more : https://social.technet.microsoft.com/Forums/windowsserver/en-US/f6885ef7-fdc5-460c-86a8-cf262ec795ef/microsoft-excgane-2010-mailbox