If the AutoComplete feature is not disabled, the AutoComplete list is automatically updated after sending an email (see more about the AutoComplete feature). If you did not reach the maximum number of entries, all the email addresses you use to send messages are stored in the AutoComplete list.

By default, Outlook uses the AutoComplete list to suggest email addresses when you start typing an address in the To, Cc, or Bcc fields. If the AutoComplete feature is not disabled in Outlook (see how to turn this feature off in Outlook for Windows), the AutoComplete list is updated automatically after sending an email.

Outlook proposes easy and fast way to import contacts from the CSV file to your Outlook. It can be prepared in Excel or saved in another Outlook instance (see How to export Outlook Contacts to a CSV file).

You may want to save Outlook contacts for future use. For example, to move them to another PC, or add them to another email client. Fortunately, you can save all contacts to the file in CSV format.

Exchange Server users or Microsoft 365 Business subscribers can share a contact folder with another person inside and outside of the organization if sharing contact lists is supported by the organization's sharing policies. If you do not have an Exchange Server account or your organization policies do not allow contact folders sharing, Microsoft Outlook does not offer the Share Contacts option. However, you can share contact lists, email groups, or distribution lists by creating the contact group, attaching it to the email, sending the email, and importing.

If you regularly send emails to the group of people like your project team or your amateur soccer club, a one-time effort to create an email group for the distribution list pays off in the future many times. Microsoft Outlook offers a Contact Group to manage contact lists with a handful of personal contacts, email groups with dozens of team members, or distribution lists with thousands of subscribers.

Microsoft automatically creates the address book when you create a Personal Folders profile, but only one address book is added to the profile. Sometimes you need two or even more different address books: for the projects, relatives, hobbies, etc. Fortunately, you can easily create additional address books out of the profile for different needs.

When you work with a lot of contacts, you may need to create two different Contact Group with a small difference – the bigger one should contain all members from the smaller one and some additional members. The main point is, if the smaller Contact Group has been updated, the bigger one should include those changes.

When you organize your Contacts, you may need to create a new Contact Group that will contain a lot of members from an existing Contact Group. Sure, you can create a new Contact Group and add all members manually, but if there are too many members, it will be easier to copy an existing Contact Group and delete or add some members.

Now we receive a lot of messages. Some messages have been marked as junk mail automatically or by some rules, but sometimes you really need to receive those emails.
For example, subscriptions or regular reports often marked as junk mails.