A manager in our organization wants a quick and easy way to see a person's extension number when he looks at the contact card from office (the small one that appears when you hover or a name not the full card) but does not want it as part of the normal office number. Looking inside of Active Directory I did not see any where to add an explicit extension and no place looked to be appropriate for that. As a test I added my extension to the "other" telephone number as well as the "Notes" fields and I can see those pop up in the full contact card information window on the Phone/Notes tab but I don't see them in the quick info window. What is the easiest/best way to get out extensions listed as an additional field?

  • Can the extension be displayed on the expanded contact card (hover, click the downward arrow) or it must be on the tiny card? – sippybear Feb 24 '16 at 0:57
  • @sippybear Yes, that is where we are trying to show the info at. – Matthew Verstraete Feb 24 '16 at 14:05

In AD Users and Computers, use the Attribute Editor to populate a field with the user's extension.

Edit: To enable Attribute Editor:

  • Open AD Users and Computers
  • Click View -> Advanced Features (make sure it is selected)
  • Now "Attribute Editor" will be a tab when you select "Properties" on an AD User

Here's a couple attributes you may want to use:

AD Attribute | Outlook Field

  • telephoneNumber | Business
  • otherTelephone | Business 2 (recommended)
  • facsimileTelephoneNumber | Fax
  • telephoneAssistant | Assistant
  • homePhone | Home
  • otherHomePhone | Home 2
  • mobile | Mobile
  • pager | Pager

If you install the Office ADMX templates, you can customize which fields are displayed on the contact card. The templates are available here:


There is a TechNet article about customizing all sorts of features in Outlook 2013 via GPO. The portion specifically about Contact Cards is available here:


The relevant GPO Path is here:

User Configuration\Policies\Administrative Templates\Microsoft Office 2013\Contact Card\Contact Tab

In this section there are options to customize label names and change what attributes are displayed.

  • Thanks for this, we will test it out and see how it goes. – Matthew Verstraete Feb 24 '16 at 22:01
  • Thanks for the help, I have accepted this answer and awarded the bounty. I would up vote it but apparently I lost that ability when I put the bounty up. – Matthew Verstraete Mar 1 '16 at 20:07
  • Awesome, I'm glad it worked out :) – sippybear Mar 3 '16 at 5:28

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