Microsoft 365 Email Setup on Your Domain

When Microsoft 365 makes sense

Microsoft 365 is the natural choice if your business runs on Outlook, Word, Excel and Teams. It adds shared calendars, OneDrive and SharePoint storage, and shared mailboxes with proper permissions, all tied to one sign-in per user.

It is not always needed. A small team that only sends and receives email may be well served by hosted mailboxes; see email hosting and email hosting vs Microsoft 365. If your team prefers Gmail and Google Docs, Google Workspace is the equivalent.

The DNS records Microsoft 365 needs

We copy values from your tenant rather than typing them from memory, because Microsoft generates them per domain. In Cloudflare, every one of these stays "DNS only".

How we run the set-up

1. You buy the licences from Microsoft or your reseller, so the tenant is in your name.
2. We add your domain in the admin centre and publish the verification TXT record.
3. We create users, aliases and any shared mailboxes or groups.
4. If mail exists elsewhere, we copy it in first. The method is on moving email provider.
5. We lower the TTL, switch the MX record, add autodiscover and merge Microsoft into your existing SPF record rather than adding a second one.
6. We publish the DKIM CNAMEs and switch signing on, then add DMARC at p=none and review the reports before tightening.
7. We help connect Outlook on desktops and phones.

Mistakes we often fix

• DKIM never enabled. The CNAMEs are published but signing was not switched on, so mail goes out unsigned with your domain.
• Old MX records left in place, so some mail still lands at the previous host.
• A second SPF record added for Microsoft, which makes SPF fail for everything.
• Autodiscover missing, so Outlook keeps asking for server settings.

Help with the records themselves is on SPF, DKIM and DMARC records and MX records set-up.

Everything else that sends as you

Microsoft 365 is rarely the only thing sending mail from your domain. Website contact forms, accounting and invoicing software, booking systems and newsletter tools often send as you too. Each one must either be listed in your SPF record or sign with DKIM on your domain, or DMARC will flag its mail once the policy is tightened.

SPF has a limit of 10 DNS lookups, and every include counts, so a long list of tools can break it. We check the total when we merge Microsoft in. Microsoft also applies its own rules: since 5 May 2025, domains sending over 5,000 messages a day to Outlook.com, Hotmail and Live addresses need SPF, DKIM and DMARC in place.

How dijitul helps

Our Microsoft 365 set-up is £45 an hour + VAT, or a fixed quote when mailboxes are being moved. You pay Microsoft's own per-user price for the licences. We manage the DNS side afterwards in Cloudflare. For day-to-day Microsoft 365 support, user changes and device problems, our sister site dijitul support covers IT support. Call 01623 650333 or email info@dijitul.uk.

How it works and what it costs

Domains are priced live in the client portal. DNS management and 10 mailboxes are included with dijihost Complete Hosting at £1 a day + VAT. On their own, DNS and email set-up is £45 an hour + VAT or a fixed quote.

1. Tell us what you have

   Your domains, who they are registered with, where your DNS and email live today, and what you want to change.

2. Plan the change

   We list every DNS record and mailbox first, so nothing is forgotten, and agree a time to switch.

3. Make the switch

   Transfers, nameserver changes, DNS records and mailbox moves, done carefully with low TTLs and a rollback plan.

4. Check it works

   We test the website, email delivery, SPF, DKIM and DMARC from the outside before calling it done.

5. Look after it

   Renewals, records and email stay looked after, and you can call a person when something changes.

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