# Running the Platform Glossary

> 34 terms from the Workplace & Collaboration book's Running the Platform part, each defined in a line and linked to the chapter that explains it.

- **Accessibility conformance report (ACR):** A completed VPAT with documented test results, rating each criterion as Supports, Partially Supports, Does Not Support or Not Applicable ([Accessibility & Localization](https://www.syntaqx.com/books/workplace-and-collaboration/accessibility-and-localization#vpats-and-conformance-reports)).
- **Adoption Score:** Microsoft's organization-level score of how a tenant uses Microsoft 365, in equally weighted categories over a 28-day window ([Workplace Metrics](https://www.syntaqx.com/books/workplace-and-collaboration/workplace-metrics#adoption-reports-for-the-customer)).
- **App protection policy (MAM):** Intune policy that protects corporate data inside a managed app, with or without device enrollment, including selective wipe ([Desktop & Mobile Clients](https://www.syntaqx.com/books/workplace-and-collaboration/desktop-and-mobile-clients#mobile-managed-apps-on-unmanaged-phones)).
- **Blocking floor:** The client version below which a vendor refuses to serve a desktop or mobile client, such as Teams' page for clients more than three months old ([Desktop & Mobile Clients](https://www.syntaqx.com/books/workplace-and-collaboration/desktop-and-mobile-clients#auto-update-and-version-floors)).
- **CART:** Communication Access Real-time Translation, human-generated live captions brought into a meeting by a captioner ([Accessibility & Localization](https://www.syntaqx.com/books/workplace-and-collaboration/accessibility-and-localization#captions-transcripts-and-interpreters-in-meetings)).
- **Cell (tenant placement):** A slice of the system (servers, caches, databases) serving a fixed set of tenants or a zone, so that a failure stays inside it ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#cells)).
- **Client boot:** The call a chat client makes on connect to load channels, preferences and unread state, and the critical path in both Slack incident reviews ([Reliability, Outages & SLAs](https://www.syntaqx.com/books/workplace-and-collaboration/reliability-and-outages#what-the-incident-reviews-teach)).
- **Cloud Solution Provider (CSP):** Microsoft's reseller program, with indirect resellers buying through distributors and direct-bill partners buying from Microsoft ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#resellers-and-the-microsoft-csp-channel)).
- **Colo (Figma):** A group of related tables that share a shard key and physical layout so joins and transactions within one key still work ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#how-the-platforms-do-it)).
- **Co-terming:** Aligning the end dates of a customer's subscriptions so they renew together, usually by prorating add-ons to the existing term ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#co-terming)).
- **Domain claiming:** Verifying a corporate email domain and taking control of the accounts on it as managed accounts ([From Self-Serve to Enterprise](https://www.syntaqx.com/books/workplace-and-collaboration/selling-to-enterprises#domain-capture-and-admin-claiming)).
- **Drain:** Shifting traffic away from a zone or cell quickly and incrementally, as Slack does by reweighting Envoy clusters ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#cells)).
- **Expansion signal:** Product usage or account metadata (domain spread, plan limits, governance interest) that suggests an account is ready for a sales conversation ([From Self-Serve to Enterprise](https://www.syntaqx.com/books/workplace-and-collaboration/selling-to-enterprises#expansion-signals-and-sales-assist)).
- **Fair Billing Policy:** Slack's rule that members inactive for more than 28 days stop billing, with prorated credits ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#how-the-platforms-do-it)).
- **Large-customer count:** The number of customers above a revenue line (such as $100,000 ARR), the common public proxy for enterprise success ([Workplace Metrics](https://www.syntaqx.com/books/workplace-and-collaboration/workplace-metrics#how-the-platforms-do-it)).
- **License reclaim:** Finding seats with no recent activity and removing or reassigning them ([Workplace Metrics](https://www.syntaqx.com/books/workplace-and-collaboration/workplace-metrics#license-utilization-and-reclaim)).
- **Logical shard:** A partition of data (often a schema) mapped onto a smaller number of physical databases, so capacity changes are remaps ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#logical-shards-and-moving-tenants)).
- **Maximum Quantity Billing:** Atlassian's monthly billing on the highest seat count reached during the cycle ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#counting-seats)).
- **Migration mode:** A state of a destination container that accepts back-dated, attributed imports and is explicitly completed, as in the Teams import API ([Migrations, Imports & Switching](https://www.syntaqx.com/books/workplace-and-collaboration/migrations-and-switching#importers-and-migration-mode)).
- **Post-incident review (PIR):** The vendor's published account of an incident's cause, timeline and fixes; Microsoft commits to a preliminary PIR within 48 hours for broad incidents ([Reliability, Outages & SLAs](https://www.syntaqx.com/books/workplace-and-collaboration/reliability-and-outages#status-service-health-and-the-admin)).
- **Private offer:** A negotiated price for one customer transacted through a cloud marketplace, with listing fees by contract value ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#cloud-marketplaces)).
- **Proration:** Charging or crediting a seat change for the fraction of the period remaining ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#proration)).
- **Scatter query:** A query without the shard key that must ask every shard, cheap while a cache hides it and dangerous when it doesn't ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#choosing-the-shard-key)).
- **Seat ledger:** The append-only record of seat-count changes and their causes from which billable quantities are derived ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#how-to-build-it)).
- **Seat utilization:** Active members as a share of paid seats on a subscription ([Workplace Metrics](https://www.syntaqx.com/books/workplace-and-collaboration/workplace-metrics#product-metrics-inside-the-vendor)).
- **Service health:** A tenant-scoped incident and advisory feed for admins, alongside the public status page ([Reliability, Outages & SLAs](https://www.syntaqx.com/books/workplace-and-collaboration/reliability-and-outages#status-service-health-and-the-admin)).
- **Shared container host:** The one tenant that stores a container shared across organizations, which other organizations read through ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#how-to-build-it)).
- **Siloing:** Making a service take traffic only from its own zone and call only servers there, so a zone can be drained ([Building It Yourself](https://www.syntaqx.com/books/workplace-and-collaboration/collaboration-architecture#cells)).
- **Soft delete (tenant):** Marking a workspace deleted with a delay and purge date so it can be restored, the main change after Atlassian's 2022 outage ([Reliability, Outages & SLAs](https://www.syntaqx.com/books/workplace-and-collaboration/reliability-and-outages#atlassian-april-2022-deleting-tenants-is-the-dangerous-operation)).
- **Switching (EU Data Act):** A customer's move between data processing services, with contract clocks and, from January 12, 2027, no switching charges ([Migrations, Imports & Switching](https://www.syntaqx.com/books/workplace-and-collaboration/migrations-and-switching#the-eu-data-act-switching-as-a-duty)).
- **Tenant-to-tenant migration:** Moving users and content between two tenants of the same product after a merger or divestiture ([Migrations, Imports & Switching](https://www.syntaqx.com/books/workplace-and-collaboration/migrations-and-switching#tenant-to-tenant-mergers-and-divestitures)).
- **True-up:** A periodic count of seats used above a committed quantity, invoiced as overage ([Billing, Seats & Resellers](https://www.syntaqx.com/books/workplace-and-collaboration/billing-and-seat-management#true-ups-and-tiers)).
- **User-minutes:** Microsoft's SLA unit for collaboration services: incident minutes multiplied by users affected ([Reliability, Outages & SLAs](https://www.syntaqx.com/books/workplace-and-collaboration/reliability-and-outages#how-the-platforms-do-it)).
- **VPAT:** ITI's Voluntary Product Accessibility Template, in 508, EU, WCAG and INT editions ([Accessibility & Localization](https://www.syntaqx.com/books/workplace-and-collaboration/accessibility-and-localization#vpats-and-conformance-reports)).

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