What is OB? What Opens a OB? File Format List from WhatIs.com

File Extension

OB File Format

ABF Outlook Backup file

OB is a backup file format for Microsoft Outlook. OB files are used to hold backed-up information such as messages, data files, scripts, signatures, favorites and templates. OB files can be used to restore files which have been altered or deleted.

MIME: application/outlook

Learn more about .NLS files:

Search on IT Knowledge Exchange for .NLS-related questions.

This was last updated in October 2010
Editorial Director Margaret Rouse

Ask a Question About OBPowered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

What made you want to look up OB ABF Outlook Backup file? Please tell us where you read or heard it (including the quote, if possible).



    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.