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Attributes for AD Users : otherTelephone

The Active Directory attribute otherTelephone can contain an additional list of telephone numbers where the user is available at work. The primary working telephone number for the user can be stored in the singlevalue attribute named telephoneNumber.


LDAP name otherTelephone
Data type String (max 64)
Multivalue (Array) Yes
System Flags


Search Flags 0x0
In Global Catalog? No
Attribute ID 1.2.840.113556.1.2.18
AD DB attribute name Phone-Office-Other
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.