For example: person got married and needs to update their email address and name displayed in the address book.

To change user's Primary Email Address (UPN): Note: depending on Exchange and Outlook versions and whether an Autodiscover record is created for your domain, you may need to reconfigure your mail clients (desktop and mobile).

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For @accounts, your default display name will be your first and last name as shown in the campus directory (also known as the White Pages or LDAP).

For Office 365 service accounts, the display name was manually set by your domain administrator at the time your account was created.

This is also know as “the root folder of a mailbox” or “top level folder” since it is the main container of all the folders within your mailbox.

The name of the mailbox is also appended in the Favorites section when you have folders with the same name added there.

Your display name in Office 365 is the name that will appear in the "From" field when you send emails.

It is also displayed in the Office 365 Global Address List (GAL).

If you want this display name to be different from the account name, use the MFCMAPI method.

For Outlook 2010 and previous, changing the display name of the IMAP mailbox is the same as for any other pst-file: Another way to do this in Outlook 2007 or 2010 is to select the Data Files tab in Account Settings and then double click on the pst-file.

I made sure my name is entered correctly on hotmails site.