Since the last few Outlook versions, Outlook names your email account and mailbox folder set after your email address. This results in quite large display names which aren’t always meaningful, get truncated or clutters the Outlook interface more than it should.
For instance, when you set the delivery for multiple POP3 accounts to a single pst-file, it doesn’t make sense that the pst-file in Outlook is named after the email address of only 1 account.
Another example is when you have 2 or more accounts and want a more elegant or shorter display name like “Work” and “Private” rather than the full email address.
Unclutter some areas by renaming accounts and mailboxes.
Some display names can easily be changed but others, like for instance for Exchange and Outlook.com accounts, can be more challenging to change.
This guide instructs you how to change the display name of any Email Account type or Mailbox Folder set in Outlook.
Continue reading: Rename Email Accounts and Mailbox Folders