Your Data, Your Responsibility

Microsoft 365 Backup: Close the Security Gap in the Cloud

Many organizations operate under the dangerous assumption that Microsoft backs up their Office 365 data. This is a misconception. Microsoft guarantees infrastructure uptime, but you are responsible for your data. If an employee deletes a critical folder, or you are hit by ransomware, Microsoft cannot help. Stratu delivers a complete backup solution that ensures your data can always be restored—no matter what happens.

Everything Is Covered

We do not just back up emails. We protect your entire collaboration platform: Exchange Online, SharePoint, OneDrive, and Microsoft Teams (including files and chats).

Data Sovereignty

Take your long-term backup retention with you if you leave us. Stratu offers a service you can bring back in-house if you ever choose to.

Away from Microsoft

Store your Microsoft backup data in a cloud that is professional, secure, and completely separate from Microsoft’s cloud. Your data is stored in Denmark.

The Shared Responsibility Model

Why the recycle bin is not a backup

Microsoft’s service agreement explicitly recommends the use of third-party backup solutions. Their built-in “Recycle Bin” is only a temporary solution for deleted files, not protection against data loss.

Without a dedicated backup solution, you are left alone with the risk of:

  • Ransomware If your OneDrive is encrypted, the corrupted files are automatically synced to the cloud. Without an isolated backup, the original files are lost.

  • Human error: 70% of all data loss is caused by users accidentally deleting or overwriting files. When the recycle bin is automatically emptied after 30 days, the data is gone forever.

  • Internal Threats: A disgruntled employee can delete critical project folders before leaving the company. Without a backup, you only discover it when it is too late.

We aim to be our customers’ best decision

We are proud to work with

Security with Veeam

Stratu Backup 365 – Your “Undo Button”

We use Veeam world-leading technology for Microsoft 365 backup to create an independent copy of your data.

We move a copy of your data out of Microsoft’s environment and into our secure Danish data centers or isolated cloud storage. This creates the necessary “air gap” that protects you against a complete Microsoft outage or compromise of your tenant.

  1. Automated Backup: Runs in the background several times a day without disrupting users.

  2. Search & Recover: Advanced eDiscovery enables you to search across thousands of emails and files to find exactly what you need.

  3. Flexible Storage: We can retain data for as long as you need—even for former employees—which helps you avoid costly Microsoft licensing.

“Microsoft ensures the train runs. We make sure your luggage doesn’t get lost along the way.”

From Risk to Peace of Mind

Get Started in Under 24 Hours

Implementing Microsoft 365 backup requires no installation on users’ computers. It is a cloud-to-cloud service that we can activate quickly.

1. Analysis & Policy We define your requirements. How long should emails be retained? Should Teams chats be archived? We configure retention policies that match your compliance requirements.

2. Activation We connect our backup engine to your Microsoft 365 tenant. This is done centrally and requires no downtime or user involvement.

3. Operations & Reporting We monitor that all backups run successfully. You receive a monthly report documenting that your data is protected—ideal for presenting during audits.

What Do We Cover?

More Than Just Exchange

Modern work doesn’t just happen in your inbox. It happens in Teams channels, on SharePoint intranets, and in personal OneDrive folders. Stratu covers it all.

  • Microsoft Teams: We don’t just protect the files, but the entire structure: channels, settings, and tabs. If a Team is accidentally deleted, we can restore everything.

  • SharePoint Online: We protect sites, libraries, and permissions. We can restore a previous version of a document, even if it has been overwritten 50 times since.

  • OneDrive for Business: We protect the files employees store “locally” in the cloud, so a ransomware attack on a single PC does not spread.

Why Choose Stratu?

Experts in the “Last Line of Defense”

When everything else fails, backup is your last line of defense. It must work. Every time.

  • Veeam Platinum Partner: We hold the highest technical certifications and have deep expertise in the solution.

  • Danish Support: If you need an urgent restore, you call a Danish specialist directly who knows your system.

  • ISO 27001: Our data handling processes are certified, so you can feel confident entrusting us with your most critical data.

Want to learn more about

Stratu as Your Backup Partner?

Complete the contact form below and one of our specialists will contact you.

Your Data, Your Ownership

Take your backup retention with you – with no lock-in.

One of the biggest concerns with cloud backup is vendor lock-in—the feeling of being stuck because you cannot take your data history with you. At Stratu, we believe that data and history always belong to the customer.

That is why we offer a unique service for full data portability:

  • No loss of history: If you ever decide to move your backup solution or bring operations in-house, we ensure you can take your long-term backup retention with you.

  • Data Portability: We provide technical assistance and services that make it possible to move your historical data “back home” to your own infrastructure or another platform.

  • Compliance Assurance: By preserving your history, you ensure that your documentation requirements and audit trails remain intact, regardless of where your future IT journey takes you.

Column in Ingeniøren

With countless emails and passwords, cyber fatigue is taking hold

In a column in Ingeniøren, our CEO Jeppe Klestrup shares his thoughts on a growing challenge: cyber fatigue.

In the article, he writes:

"Cyber fatigue is a form of mental exhaustion that affects two levels. On one side are employees who face a constant stream of warnings, passwords and security requirements.

 The result is not greater vigilance, but that people tune out and ignore warnings simply to get through the working day.

On the other side are decision-makers, including IT managers tired of constantly having to choose between security, operations and budgets."

– Jeppe Klestrup, CEO, Stratu

Read the full column here.

Frequently asked questions:

Microsoft 365 - backup (FAQ)

No. Microsoft ensures geo-redundancy (copy of data in another data center) to protect their own operations against fire or outages. They do not provide backup to help you if you delete a file or get hacked.

Version history is useful for minor mistakes, but it does not protect against malicious deletion or a ransomware attack that encrypts all versions. It is also not a true, independent copy of your data.

Our pricing model is typically based on the number of users, not the volume of data (up to a limit). This makes costs predictable even as your data grows.

World-class international technology partners

We partner with

Ligesom vi som faglig organisation skal hjælpe, servicere og sætte os i det enkelte medlems sted, har vi brug for en IT-leverandør, der kan det samme. En leverandør, der værdsætter os som kunde og som kan designe løsninger til netop os

Frequently asked questions:

Backup til Microsoft 365 FAQ

Hvad er Microsoft 365-backup?
Microsoft 365-backup er en separat sikkerhedskopi af virksomhedens data i Microsoft 365. Det kan blandt andet omfatte Exchange Online, OneDrive, SharePoint og Microsoft Teams. Formålet er at sikre, at data kan gendannes, hvis de slettes, overskrives eller kompromitteres.

Nej, Microsoft tager ikke backup af O365. Microsoft sikrer driften og tilgængeligheden af platformen, men det er ikke det samme som en uafhængig backup af virksomhedens data, hvor man som dataansvarlig kan fremfinde historiske data og gendanne dem. Tværtimod så opfordrer Microsoft selv deres kunder på O365 platformen til at sikre en backup af data, og på den måde fraskriver de sig et ansvar for datatab.

Hvis data slettes, overskrives eller kompromitteres, kan mulighederne for gendannelse være begrænset en en skraldespandsfunktion.de. Derfor er kan en separat backup være en vigtig del af virksomhedens databeskyttelse for de fleste virksomheder.

En Microsoft 365-backupløsning kan beskytte mere end virksomhedens e-mails. Det kan blandt andet omfatte Exchange Online, OneDrive, SharePoint og Microsoft Teams, herunder filer, strukturer, kanaler og indstillinger. Microsoft 365 er blevet mere og mere central for virksomheder, og dermed er flere og flere data henlagt hertil. Et datatab vil i stigende grad medføre tab af produktivitet, både for store og små virksomheder.
Versionshistorik og papirkurv kan være nyttige ved mindre brugerfejl, men de fungerer ikke som en fuldt uafhængig backup. Ved ransomware, omfattende sletning eller kompromittering af et Microsoft 365-miljø kan en separat kopi af data være afgørende. Det kan også være brugere, som i ond hensigt ønsker at slette data.
Backup kan ikke forhindre et ransomwareangreb på data i microsofts 365 produktionsmiljø, men den kan reducere konsekvenserne markant. Hvis filer bliver krypteret eller ødelagt, kan en isoleret backup gøre det muligt at genskabe en tidligere, ikke-kompromitteret version.

Backup kan opbevares separat fra Microsofts eget miljø, eksempelvis i danske datacentre eller anden isoleret cloud-storage. Det skaber fysisk eller logisk separation mellem produktionsmiljøet og backupmiljøet.

Det er muligt at købe løsninger, der anvender Microsofts egen infrastruktur til at placere backup i. Denne løsning vil være relevant såfremt Microsofts infrastruktur kun berøres i Microsoft 365. Dog er det ofte sådan, at en backup har samme omkostninger uanset om den placeres i Microsofts datacenter, eller i eksterne og uafhængige datacentre, hvorfor sikkerheden alt andet lige er størst når backup er placeret eksternt til produktion.

Ja. Backupdata kan opbevares efter en medarbejder er fratrådt, så virksomheden fortsat har adgang til historiske data i overensstemmelse med egne krav til retention og dokumentation.
Da løsningen er cloud-to-cloud, kræver den ikke nødvendigvis installation på medarbejdernes computere. Implementeringen omfatter typisk opsætning af retention-politikker, forbindelse til Microsoft 365-miljøet samt overvågning og rapportering. De fleste backup operatører, som fx Stratu, har standardiseret multi-kunde miljøer, hvor etablering af en ny løsning klares på minutter, og kræver begrænset adgang og beslutningstid for vores kunder.

Det afhænger af den valgte løsning, men dataportabilitet bør være en vigtig del af backupstrategien. Det gør det muligt at flytte eksisterende backupdata og historik, hvis virksomheden senere ønsker at skifte løsning eller leverandør.

En af de eneste løsninger, der tilbyder at backupdata kan håndteres både af en service provider og af slutkunder i egen infrastruktur er Veeam. Selvom Veeam dataformatet er properitært, så giver det defacto effekten af en åben standard.

Beskyt jeres Microsoft 365-data

Book et møde med Lars om backup af Microsoft 365

Få en uforpligtende snak om, hvordan I sikrer jeres data i Microsoft 365 mod sletning, fejl og cyberangreb. Lars hjælper med at afdække jeres behov og skabe en backup-løsning, der giver jer bedre kontrol og mulighed for hurtig gendannelse.

Our customers say it best.

We wanted a flexible platform that could keep pace with developments and support the organisation without unnecessary administration.
Frederik Krebs Jensen
Head of Technology at e-Boks
Stratu has a strong team with a clear customer focus. They have helped us build a digital foundation that supports both operations and development.
Dennis H. Krogstrup
CIO Group Online