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1,513 articles
DSE visual briefPhysical security

Design multicast video with controlled group membership and tested fallback

Multicast can reduce duplicate video streams, but missing queriers, uncontrolled flooding, inconsistent IGMP behavior, routing boundaries, or silent failback can turn efficiency into an outage. Engineer and test the entire group path.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefContinuity & recovery

Prove VMS archiver failover under full load—not just configuration state

A configured standby does not prove that all cameras will transfer, record, remain viewable, merge cleanly, and return under production load. Validate the exact failure, takeover, degraded operation, recovery, and evidence path.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefPhysical security

Test every door’s degraded modes before the network or server disappears

Door behavior during loss of server, network, controller communication, reader, lock power, or fire-interface state must be designed—not discovered. Test each distinct door safely against approved life-safety and security requirements.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Use authentication context to require stronger proof only when the action deserves it

Microsoft Entra authentication context can invoke Conditional Access for a sensitive action inside a capable application. Use it to add risk-appropriate step-up without assuming it protects unsupported paths or replaces baseline access policy.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Design cross-tenant access settings before B2B collaboration scales

Microsoft Entra cross-tenant access settings govern inbound and outbound B2B relationships and trust in external MFA or device claims. Inventory real partners, defaults, applications, and lifecycle before broad collaboration becomes the policy.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Revoke Microsoft 365 sessions with evidence—not assumptions about token expiry

Blocking sign-in and revoking refresh tokens are important, but existing access and application sessions can end on different timelines. Run a documented containment workflow and verify effective loss of access across supported services and independent applications.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Give every shared mailbox an owner, sign-in boundary, and review cadence

Shared mailboxes outlive projects and teams unless someone owns membership, direct sign-in, forwarding, retention, licensing, automation, and closure. Govern each mailbox as a business service, not a permanent bucket of delegated access.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Build a defensible Microsoft Purview retention and legal-hold decision tree

Retention policies, retention labels, records controls, and eDiscovery holds answer different questions. Route each requirement through legal, records, privacy, workload, license, scope, deployment, validation, exception, and release decisions.

Published Reviewed 3 min readBy DSE Security Editorial Team
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DSE visual briefIdentity & cloud

Move Windows services from reusable passwords to managed service identities where supported

Group Managed Service Accounts let supported domain services use domain-managed passwords and simplified SPN management. Migration still requires application support, dependency discovery, least privilege, host authorization, staged testing, and rollback.

Published Reviewed 3 min readBy DSE Security Editorial Team
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