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  1. Migrations

    A SharePoint cutover stops being reversible when the new farm accepts writes

    Keeping the old farm available preserves a fallback environment. It does not preserve changes accepted by the new one. A decision matrix and an offline counterexample separate routing recovery from data reconciliation.

    ·6 min read

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  2. Development & automation

    A hybrid SharePoint integration needs more than a successful sign-in

    A Java or .NET API can authenticate a caller while the downstream SharePoint operation still has the wrong authority. Compare the identities, contracts and failure boundaries before choosing a gateway or extracting legacy functionality.

    ·6 min read

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  3. Development & automation

    Writing to two systems is not a transaction

    An application that saves one change in two systems has two outcomes, and nothing commits them together. What Microsoft's architecture guidance says about why the copies drift apart, where a transaction across two systems does exist, and what makes the result recoverable: one record of the change, delivered at least once to a consumer that ignores repeats, and compensation for what cannot be derived.

    ·15 min read

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