File Extension OST

File type: Offline Cache

Click here to run a free instant scan for OST related errors.

Notes about the OST file extension:

Errors in your registry are one of the common causes for incorrect file associations on your windows system. It is highly recommended that you check your registry for file association errors (will also check for any other registry errors).

The OST file type is primarily associated with 'Exchange' by Microsoft Corporation.

Cannot access OST files on windows?

When windows gives you an error message saying that it
"Cannot open OST files", this means either:

A. You need to identify a program that can open the file
B. Or your registry may be damaged

RECOMMENDED:

In both cases it is strongly recommended that you
run a free scan for registry errors.

File extension: .OST

Detailed information for file extension OST:

Primary association: Exchange

Company: Microsoft Corporation

Identifying characters Hex: 21 42 44 4E , ASCII: !BDN

Program ID: OSTFile , WEBFile

Other applications associated with file type OST:

On-Screen Takeoff (Project) by On Center Software, Inc.On-Screen Takeoff is software used in creating takeoffs from digital and paper plans.
Outlook (Offline Storage File) by Microsoft CorporationThe .PST file has a 2GB file size limit. When approaching the 2GB limit, if Office SP-1 is not installed, Outlook becomes extremely unstable to the point of not being able to clicking on any message, folder, etc. without locking Outlook. This includes attempting to access an .OST file. To shrink the file, delete items from their folders and then clear the Deleted Items folder using Tools | Empty Deleted Items Folder. Outlook will compress the folder in the background while the computer is idle so you may not see a size decrease immediately. The identifying characters used for this association are - Hex: 21 42 44 4E , ASCII: !BDNProgram ID: OSTFile , WEBFile Related links: MS Knowledge Base Article
Tivoli Storage Manager (File) by IBMThe IBM Tivoli Storage Manager family of offerings is designed to provide centralized, automated data protection that can help reduce the risks associated with data loss.

'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database

Technical data

To view technical data on file-extension OST click this link to expand/hide the additional area.

System Info for File Extension .OST

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: OSTFile, FileType: Office Data File

ProgramID: webfile, AppName: Dreamweaver MX

ProgramID: WEBFile, FileType: Office Data File

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