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Moving a Utility Field-Services Contractor onto a Secure Microsoft 365 Tenant

Industry
Utility field services
Location
Houston area
Size
Under 10 users
Services
Microsoft 365, cloud, cybersecurity

Client details are anonymized to protect their privacy. Results are taken from our project records.

The challenge

The company’s Microsoft 365 had been bought through its domain registrar as a bundle. That kind of tenant limits what an IT provider can manage: security settings, device management and licensing all run through the reseller. It couldn’t simply be transferred, so the company needed a new tenant and all of its existing email moved across.

At the same time, a software developer building a production database for the company had asked for a cloud database tier costing more than $700 a month.

What we did

A tenant the company controls

We set up a new Microsoft 365 tenant under our Microsoft partnership and moved the domain’s DNS to a provider we manage, so every setting is visible and changeable.

Email migration with nothing lost

We copied mailboxes between tenants with original dates and headers intact, and with automatic retry and resume so a dropped connection couldn’t lose a message.

Email authentication

SPF and a reject-level DMARC policy were already in place; we enabled DKIM signing in Microsoft 365 so all three pass. That makes it much harder for someone to send email pretending to be the company.

Security baseline from day one

Multi-factor authentication, blocked legacy sign-ins and device compliance rules through Conditional Access, plus Microsoft 365 device management with compliance policies, configuration profiles and security baselines on company PCs.

Right-sizing the database

Before provisioning, we checked what the application actually needed. A standard Azure SQL database met the requirement at roughly $50–150 a month instead of $700+, with long-term backups, a firewall limited to known addresses, and a simple tool so the developer can update their own allowed address.

The results

1,744

email messages in 28 folders (513.7 MB) migrated between tenants with 0 failures and 0 skipped.

3 / 3

email authentication checks passing: SPF, DKIM and DMARC at reject.

$700+ → ~$50–150

estimated monthly database cost, by choosing the tier the application needed.

Small companies deserve the same controls as big ones. The difference is doing it without waste: the right license, the right database tier, and security switched on before anyone logs in.

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