The Outlook Address Book is created automatically and contains the contacts in your default Contacts folder that have either email addresses or fax numbers listed. These contacts are displayed in the Address Book dialog box when you click Contacts in the Address Book list.
Open Windows Explorer, click the "C" drive icon, and double-click the "Users" folder to open it. Double-click the folder with your username, and then double-click "AppData | Local | Microsoft | Outlook" to access the OST file.
What is the difference between Outlook contacts and Address Book?
The contacts in your Contacts folder make up the contents of the Outlook Address Book. If you create other Contacts folders, each of these folders is also listed in the Address Book list, available for you to choose from. If your company has a Global Address List (GAL), you also see it in the Address Book list.
Outlook Data Files (. ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail).
PST File Format is used for POP Accounts, while the OST file format is used for IMAP Accounts. Just as POP, IMAP (Internet Message Access Protocol) is another popular email protocol used by your email providers –which is usually the case with Outlook Accounts –Exchange Accounts, Microsoft 365 Accounts, etc.
Certain types of accounts, such as POP accounts, store their information in Outlook Data Files (.pst files). Outlook 365 accounts, Exchange accounts, IMAP accounts, and Outlook.com accounts store their information in Offline Outlook Data Files (.ost files).
What is the difference between PST and OST files in Outlook?
Difference b/w Outlook OST and PST file:
OST is the offline folder created by the M.S. Outlook and Server to store offline copies of data, whereas PST is not created by the Outlook or Exchange Server. Users create it to store emails, contacts and calendar entries, etcetera.
How do I copy all my contacts from Outlook address book?
On the toolbar, select Manage > Export contacts. Choose to export all contacts or only contacts from a specific folder, and then select Export. At the bottom of the page, select Save to save "contacts. csv" in your default Downloads folder.
Important: Outlook data is stored locally on the computer, so contacts imported to Work for Desktop on that computer will only be available on Work for Desktop on that computer.
Dear coordinator, New contacts are saved in your default Contacts folder, and you will also see them under All contacts. If you want to save the contact in a different folder, select the folder before creating the contact.
Sign into your Outlook on the web or Outlook.com account. At the upper-right corner of the page, click Manage> Import contacts. Click the Browse button, select your CSV file and click Open.
When you want to create archives or back up your Outlook folders and items on your computer, such as Exchange accounts, you must create and use additional . pst files. Outlook Data Files (. ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode.
Outlook can create 2 OST files if you have multiple Outlook IMAP profiles configured; for example, one default and one created by you. The second OST file could be an old file or may be associated with a different Exchange account. Outlook sometimes generates new OST files when another session has one locked.
Outlook creates a PST file when you add a POP3 account in Outlook 2010 or later versions. OST is created when users sign in using an Exchange, Office 365 (Microsoft 365), Outlook.com or IMAP email account.
