Pared de buzones metálicos numerados en el vestíbulo de un edificio, con una papelera al fondo

Your Exchange Online backup hangs on a single text field

Microsoft flipped the switch today, 10 October, in its multi-tenant cloud: a tenant with EwsEnabled set to $true and an empty allowed-application list stops letting every app through and starts letting none through. On the 8th and 9th Microsoft wrote that list for you, from whatever it saw using EWS over the previous 60 days. If you back up Microsoft 365 mailboxes, your backup now depends on a list you probably did not write, stored in a parameter the documentation declares as a text field that supports no add and no remove: only a full rewrite.

Backup Microsoft 365 Exchange

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Sala con filas de puestos de trabajo idénticos, mamparas bajas y sillas vacías

8 Oct 2026 12 min read

Microsoft retires Targeted Release: your test ring is now paid for by everyone else

On 7 October 2026 Microsoft published advisory MC1490899 and updated three documentation pages the same day: Targeted release retires in January 2027 and from November 2026 its list can no longer be touched. The coverage reads it as a rename to Standard and Deferred. It is not. Reading the three pages together yields something else: to keep a validation group that runs ahead, Microsoft's own recommendation is not to move the pilot forward but to hold everyone else back by thirty days. Inside: the official mapping table read backwards, the documented cap of 100 users where each member of a security group counts one by one, the two kinds of change Deferred does NOT delay, and the seven checks that fit in half an hour before 31 October.

Microsoft 365 Workplace Compliance

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Sala con filas de puestos de trabajo: torres bajo las mesas, monitores apagados, teclados y cables recogidos

15 Sep 2026 10 min read

EDR isolates the device on its own; the rule that brings it back is written beforehand

On 3 September Microsoft added a sentence to the Defender for Endpoint documentation and by the next day it was gone: it warned that automatic isolation fires as FULL isolation and that, with a web proxy, the device might not recover. The two facts it joined are both still published, but in separate sections. What gets isolated on its own and what does not, what "containing" does and what "isolating" does, and the way back point by point.

Cybersecurity EDR/MDR Microsoft 365

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Sala de servidores en penumbra con un armario de red abierto y una etiqueta de inventario despegada colgando de un cable

19 Aug 2026 9 min read

Your documentation is lying to you. And so are your validations

A document does not age: it expires, and it does so silently. Markdown cannot tell the difference between what you checked, what can be checked, and what you assumed, so six months later all three read the same. We tell the real case that led us to build validated-memory: evidence states, supersession without deletion, and freshness probes with three answers instead of two. Released as open source under Apache-2.0.

Documentation DevOps Open Source

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Panel de parcheo de fibra con latiguillos etiquetados a mano: la documentación de red que deja de coincidir con la realidad

6 Aug 2026 9 min read

Your network spreadsheet lies: how we build a source of truth with NetBox

Documenting a network is not scanning it. NetBox's own documentation says so plainly: it represents the desired state of a network rather than its operational state, and it discourages automated import of live network state. That is the criterion almost nobody applies. What NetBox is and is not, the three-question test for whether your inventory is worth anything, what we document and what we deliberately do not, and when you do not need any of this.

Networks NetBox Documentation

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everyWAN Blog

Your Exchange Online backup hangs on a single text field

Microsoft retires Targeted Release: your test ring is now paid for by everyone else

EDR isolates the device on its own; the rule that brings it back is written beforehand

Your documentation is lying to you. And so are your validations

Your network spreadsheet lies: how we build a source of truth with NetBox

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