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leeand00
Asked: 2016-07-16 11:33:09 +0800 CST

ldap query for blank attribute value?

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How does one query an ldap attribute for a blank value? The equivalent of str1==null in programming?

I tried the following but it didn't work:

(&(objectCategory=computer)(whenCreated>=20160101000000.0Z)(description=))
(&(objectCategory=computer)(whenCreated>=20160101000000.0Z)(description=''))
ldap

1 Answers

  1. Best Answer

    You have to negate matching the wildcard * (any value) :

    (&(objectCategory=computer)(whenCreated>=20160101000000.0Z)(!description=*))

    From Microsoft's LDAP Query Basics:

    The ! operator in conjunction with the wildcard operator will look for objects where that attribute is not set to anything.

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