The SeatPrune Blog

Practical guides on Microsoft 365 licensing, cost optimisation, and the waste hiding in your tenant.

·8 min read

SeatPrune vs CoreView vs Trelica (Now 1Password): Which M365 License Tool Fits Your Team?

Updated comparison: CoreView pivoted to security, Trelica became 1Password SaaS Manager, Zluri left the category. Who still does M365 license optimization?

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·5 min read

Trelica Is Now 1Password SaaS Manager — What It Means for SMB License Management

Trelica's free tier is gone and the product moved enterprise. What former Trelica users and SMB evaluators should look for now.

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·6 min read

License Drift: Why Your Microsoft 365 Bill Creeps Up Every Month

Nobody approved a bigger M365 bill, yet it grows every quarter. The four mechanics of license drift and how to stop them.

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·6 min read

How MSPs Turn M365 License Optimization Into a Recurring Revenue Stream

License auditing is the rare MSP service that pays for itself in the first meeting. Three ways to package and price it.

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·8 min read

The Microsoft 365 License Audit Checklist: 10 Checks Before Your Renewal

A practical 10-point audit to run 60–90 days before your M365 renewal — the checks, the order, and what each typically saves.

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·5 min read

Disabled Accounts With Active Licenses: The Silent Budget Leak

Blocked sign-in doesn't mean stopped billing. Why disabled M365 accounts keep their licenses, and how to reclaim them safely.

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·5 min read

Shared Mailboxes Don't Need Licenses — Here's What That Mistake Costs

Shared mailboxes under 50 GB are free, yet tenants routinely pay full user licenses for them. How it happens and how to fix it.

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·6 min read

Microsoft 365 E5 vs E3: Is the $21/User Upgrade Actually Worth It?

E5 costs $57/user/mo vs E3 at $36. A practical framework for deciding who actually needs E5 — and how to find users who don't.

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·7 min read

How to Find Unused Microsoft 365 Licenses: The Complete Guide

Three ways to find unused M365 licenses — admin center, PowerShell, and automated tools — plus what "unused" actually means.

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