Did the Azure Product Terms' text on synthetic voices change between October 2025 and October 2026 copies, and what additional consent, opt-out and disclosure duties does the Microsoft AI Services Code of Conduct put on apps that let external users create voices?

In three Internet Archive copies of the Azure Product Terms (2025-10-10, 2026-02-26, 2026-10-06) the Permissions and Permitted uses paragraphs on synthetic voices carry the same obligations, with wording differences limited to 'text to speech' becoming 'TTS' and 'all TTS implementations' becoming 'all implementations of TTS Services'; the Limited Access list renames 'custom neural voice' to 'custom voice' in the 2026-10-06 copy. The Code of Conduct for Microsoft AI Services (version 4.0, 5/1/2026) separately requires applications offering voice features to external users to allow opt-out and removal of the voice, to forbid pre-existing recordings as training data, to limit each user to their own voice, to obtain verbal consent through a Microsoft acknowledgement statement, and to disclose the synthetic nature of generated voices. Observations only; the live Product Terms could not be fetched. Curator qualifications: Independent word diff (curator extraction from the gzipped archive bodies, not the producer script) of the Permissions paragraph: 2025-10-10 to 2026-02-26 changes only 'text to speech' to 'TTS' (plus extraction-boundary tokens); 2026-02-26 to 2026-10-06 shows no word differences. The Limited Access rename (custom neural voice to custom voice) is confirmed in the 2026-10-06 copy, and the retain-copy sentence appears in all three. All Code of Conduct clauses verify. The three copies are different Product Terms pages: two allprograms captures (one with an encoded trailing backslash in its URL) and one MCA program page. Comparability across program pages is assumed, not shown. The rights_conflicts flag on this item concerns two consent regimes (Product Terms written permission vs Code of Conduct verbal consent for external users). These are layered regimes for different relationships, not contradictory texts; record them as layered. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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