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The fastest way to open the folder where your Outlook Data Files (pst and ost) are saved is to do the following: Locating your Outlook Data Files is easy. Those days are long gone and now Outlook data files can theoretically grow into many Terabytes. In the early days of Outlook, PST/OST’s were limited to less than 2GB. Outlook Data Files of 20GB or more are quite common these days. That’s quite normal and nothing to worry about. They can grow to saving many years of email, contacts, appointments etc. PST and OST files can get big, really big. You’ll access and search your ‘life’ a lot faster and be less reliant on Internet access. The ‘Mail to keep offline’ setting to ‘All’. That’s great if you have limited disk space, If you have plenty of disk space (most desktop and laptop computers will) then it’s better to synchronize everything.
#Office 365 outlook ost file location windows#
Recent versions of Outlook for Windows can only synchronize recent data, leaving older data on the server. Even if your connection to the mail server is interrupted, for example, when you’re on an airplane without WiFi or if your internet connection disconnects, you can still access all emails, calendar data, contacts, and tasks that have been previously downloaded. OST’s have a synchronized copy of your mailbox information on your local computer.
#Office 365 outlook ost file location Offline#
Account types such as Office 365 email hosting, Exchange accounts, and accounts all use an Offline Outlook Data File (ost) file. These days they are used by other mail services that have Microsoft’s ActiveSync technology. OST files were originally for Exchange Server accounts only. PST, OST and the other places that Outlook saves settings. If the PST is badly corrupted or the computer lost, then you’ve lost it all.Įveryday Backups has a chapter devoted to backups of Outlook data. It’s VITAL that you backup your PST files because they are the only copy of your information. See our popular article on speeding up IMAP with Outlook to speed up the connection. It depends on your IMAP settings and online storage capacity. Some will only be on your computer, others copied from online storage. The PST file will have a mix of items.IMAP account copy items from online to the PST file.The PST file often contains the only copy of your mail.POP accounts move mail from online to Outlook’s PST file.There’s an important difference between a POP and IMAP accounts when it comes to PST files: Using a (pst) file you can export or back up items like your email messages, calendar info, contact, and task data from your email account, and can also import your data from another (pst) file. Outlook downloads all your email messages etc from your mail server and saves them on your computer. PST data fileįor POP and IMAP accounts, a PST Outlook Data File (.pst) contains your messages and other Outlook items on your computer. Let’s see the difference between the two Outlook data files. PST and OST files are indexed by Windows so they can be quickly searched. When the connection is restored, changes are automatically synchronized. However, your email messages won’t be sent, and no new messages will be downloaded until your internet connection is restored. You can read and compose messages, create appointments, and add contacts. You can access your email etc when there’s no Internet access at all. In modern cloud mail storage (, Gmail etc) the local copy is a lot faster to access than constantly referring to the online store. The data is sometimes the only copy of your email etc. This only applies to Outlook for Windows – not Outlook for Mac. OST) are a store on your computer of email messages, calendar information, contacts, and tasks.
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But as you use Outlook more, it’s important to understand what Microsoft is doing for backup and repair purposes. Outlook Data Files are one of those things you don’t worry about when setting up Outlook for Windows for the first time.