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The QueryCategoryBySubscriber function fetches an item published in a specified enhanced presence container which is selected based on the access control lists (ACLs) associated with the indicated Subscriber and Source Network.


string QueryCategoryBySubscriber(
  string or Uri Publisher,
  string Subscriber,
  string ExternalSourceNetwork,
  string CategoryName,
  bool PublisherIsPhone


  • Publisher
    The identity of the presence publisher. Can be a SIP URI, a user URI in the form user@host, or a telephone number.

  • Subscriber
    The identity of the presence subscriber. Must be in the form user@host.

  • ExternalSourceNetwork
    The identity of the presence subscriber. Must be in the form user@host.

  • CategoryName
    The name of the presence category.

  • PublisherIsPhone
    Optional. The value is true if the publisher is a phone; otherwise, false.

Return Values

Returns the specified string.


Office Communications Server 2007 R2 provides the infrastructure to enable client applications to publish and subscribe to extended, or "enhanced," presence information. The enhanced presence infrastructure includes categories and containers. Categories are individual pieces of presence information, such as status, location, or calendar state. Containers are logical buckets into which clients publish instances of various categories of presence information.