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Attributes for AD Users : ipPhone

The Active Directory attribute ipPhone can contain the IP telephone number or address of the user. The primary IP telephone number/address for the user can be stored in the singlevalue attribute named ipPhone.


LDAP name ipPhone
Data type String
Multivalue (Array) No
System Flags


Search Flags 0x0
In Global Catalog? Yes
Attribute ID 1.2.840.113556.1.4.721
AD DB attribute name Phone-Ip-Primary
ADSI datatype 3 - String(Unicode)
LDAP syntax - Directory String
Used in ... > W2K
Schema Info Microsoft - MSDN

This field isn't used directly from the Active Directory system, it is a pure info attribute without technical meaning. However, the telephoneNumber attribute is could be used used if some unified messaging system is installed which is based on Active Directory data.

Please note that there is another multivalue attribute named otherIpPhone, which can hold a list of additional IP telephone numebrs / addresses for the user.