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Microsoft 365 and Azure, explained with the numbers.

Licensing math at Microsoft's list price, migration runbooks, the security controls that close real attack paths, and the dates that force a decision. Every guide comes from an engagement we ran.

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Migrations

46 guides

Exchange, IMAP, Google Workspace, file servers, Dropbox and Box, tenant splits and mergers: how each works, what breaks, and the service that does it.

All migrations guides →

Plan comparisons at list prices, NCE terms, license audits, CALs, Windows Server and SQL licensing, and calculators that do the math.

All licensing and cost guides →

Security

110 guides

MFA and passkeys, Conditional Access, Defender, Sentinel, email security, incident response and the CISA baselines: what to turn on first.

All security guides →

Compliance

46 guides

HIPAA, CMMC, NIST 800-171, SOC 2, FTC Safeguards, NYDFS, cyber insurance and Purview: where the evidence lives and what assessments cost.

All compliance guides →

AD FS retirement, cloud-only identity, Group Policy to Intune, Autopilot, Macs, BYOD phones and Windows 365 for a modern tenant.

All identity and devices guides →

Calling Plans, Operator Connect and Direct Routing, Teams Phone vs RingCentral and Zoom Phone, Teams Rooms, Teams Premium and NCE renewals.

All teams and voice guides →

Copilot licensing and pricing, readiness and oversharing, measured pilots, Copilot Studio agents, agent governance, and Copilot vs ChatGPT.

All ai and copilot guides →

End-of-support dates and ESU, Windows Server and SQL licensing, Azure Hybrid Benefit, servers to Azure, leaving VMware, Azure cost and landing zones.

All azure and infrastructure guides →

SharePoint storage, groups and distribution lists, archive mailboxes, domains, offboarding and rehiring: the everyday questions tenants raise.

All microsoft 365 administration guides →
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Published or rewritten most recently

Security"Central Management of All Servers" as an Audit Requirement: Meeting an Acquirer's or Insurer's Checklist with Azure Arc, Azure Update Manager and a Change Record They Can AuditWhat an acquirer's 'central management of all servers' row asks for, how Azure Arc, Update Manager and a change record evidence it, and a four-week plan.Licensing and costDoes a Portal That Authenticates Against Active Directory Need External Connectors on the Domain Controllers? The Identity-Information Rule, ExplainedA portal that authenticates outsiders against Active Directory makes each domain controller host a licensed access point: connectors, CALs or Entra ID.Identity and devicesEntra Connect Application-Based Authentication by 7 April 2027: What Changes, Which Versions Keep Syncing, and How to Switch an Existing ServerEntra Connect Sync stops on 7 April 2027 below 2.6.84.0 without application-based authentication. The version ladder, and how to switch a live server.MigrationsEntra Connect Sync to Entra Cloud Sync: Who Is Eligible, What the Guided Migration Does, and What Still Needs the Old ServerEntra Connect Sync or Cloud Sync when the server is replaced: the eligibility list, the phased migration with both running, and the 7 April 2027 bar.MigrationsFinding Everything That Still Points at an Old Domain Controller Before You Demote It: DHCP Option 006, Static DNS on Appliances, Printers, Factory Equipment and Application ConfigsNine places that still point at a retiring domain controller, the read-only logs that find them, an inventory template, and the per-site IP swap.Licensing and costGetting a 20-Server Estate off Windows Server 2016: Upgrade in Place, Move to Azure, or Buy ESU for a Year, with the Cost TableWhat it costs to get 20 servers off Windows Server 2016 by 12 January 2027: upgrade in place, Azure or ESU for a year, priced from the October 2026 list.SecurityThe Hotpatch Restart Calendar for Windows Server 2025 Domain Controllers: Baseline Months, Hotpatch Months, and How to Plan Maintenance Windows Around ThemA hotpatched Windows Server 2025 domain controller restarts four times a year plus any unplanned baseline. The cadence rule, the calendar and the windows.Licensing and costHotpatching Windows Server 2025 Domain Controllers: What Azure Arc, Virtualization-Based Security and the Hotpatch Enrollment Require, and What Each Is ChargedWhat hotpatching Windows Server 2025 domain controllers requires (Azure Arc, VBS, the enrollment) and what Microsoft charges for each piece.

Every guide, by year

264 guides

The whole library, newest first. The search and the facets at the top narrow it; this list is here so nothing is more than one click away.

2026(264)
Older posts kept for reference(33)

Published years ago and left online because links to them still exist. Each carries a banner pointing to the current guide.