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Enable contact lookup by phone number

To allow users in your environment to lookup contacts using their phone number, use the
Microsoft Active Directory
schema MMC snap-in to index and enable ANR for the applicable phone attributes.
The phone number must be in a supported format. For a list of supported formats, see Searching for users by phone number.
  1. Click the
    folder in the snap-in.
  2. In the right panel, right-click the desired attribute, and then click
  3. Select the
    Index this attribute
    check box.
  4. Select the
    Ambiguous Name Resolution (ANR)
    check box.
  5. Click
  6. If you have multiple phone attributes, repeat steps 2 to 5 for each attribute.