Access Control Service
cloud-based service for authentication and authorization
Access Control Service, or Windows Azure Access Control Service (ACS) was a Microsoft-owned cloud-based service that provided an easy way of authenticating and authorizing users to gain access to web applications and services while allowing the features of authentication and authorization to be factored out of the application code. This facilitates application development while at the same time providing users the benefit of being able to log into multiple applications with a reduced number of authentications, and in some cases only one authentication. The system provides an authorization store that can be accessed programmatically as well as via a management portal. Once authorizations are configured, a user coming to an application via ACS arrives at the application entrance with not only an authentication token, but also a set of authorization claims attached to the token. ACS was retired by Microsoft on November 7, 2018.
Begin with the source’s own compact description: “Access Control Service” is cloud-based service for authentication and authorization. The dossier treats that line as a proposition to test through Access, Control and Service, not as a finished interpretation.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated May 23, 2026. The linked authority identifier is Q4672432. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2018.
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This entry incorporates text from “Access Control Service” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.