Thirty-three things to have in hand before a Microsoft 365 migration

Scope, identity, domains, files, holds, licensing, people. Each item with a one-line reason drawn from a project where it was missing. Tick what you have; what is left is your discovery list.

What is inside

01Scope. The mailbox size report, the decision on archived mail, the site owner list.

02Identity. Directory model per tenant, duplicate people, Conditional Access, break-glass accounts.

03Domains and mail flow. What moves when, who holds DNS, what sends mail through the tenant.

04Files and Teams. External sharing, unique permissions, chat history, OneDrive redirect.

05Compliance. Holds, sign-offs, data residency, and the works council in Germany.

06Licensing. Renewal dates, commitment terms, third-party contracts tied to the old tenant.

07People and the date. Who signs, what constrains the schedule, and the question to ask every partner.

Written from our own kick-off checklist. It is what we ask for in the first week of every consolidation.

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Ticked the list?

Send it to us with the mailbox size report

That is enough for a written sequence, an honest view of what will be slow, and a fixed price — usually within one business day.

Get a costed plan Why it takes as long as it takes

Thirty-three things to have in hand before a Microsoft 365 migration

Here is your checklist

Send it to us with the mailbox size report