SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/secplus-saas-microsoft-365

Which cloud model describes using ready-made apps such as Microsoft 365, with the provider running nearly everything?

SaaS (Software as a Service): you use the app, the provider runs the rest.

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  1. IaaS
  2. PaaS
  3. SaaS ✔

Why: With SaaS you simply sign in and use the software. The provider runs the servers, operating system and network. You still handle app settings, user access and your own data.

Huh, didn't know that: Microsoft says that in SaaS it manages network security for you.

The dad joke
With SaaS the server room is someone else's problem. The password on the sticky note is still yours.
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References

Answer: SaaS. With SaaS you simply sign in and use the software. The provider runs the servers, operating system and network. You still handle app settings, user access and your own data.

  1. Microsoft Learn: Shared responsibility in the cloud learn.microsoft.com/en-us/azure/security/fundamentals/shared-responsibility
    SaaS (software as a service): You use ready-made applications. Examples include Microsoft 365
    Checked 2026-10-10.
  2. Microsoft Learn: Shared responsibility in the cloud learn.microsoft.com/en-us/azure/security/fundamentals/shared-responsibility
    In SaaS, Microsoft manages network security.
    Checked 2026-10-10.
  3. Microsoft Learn: Shared responsibility in the cloud learn.microsoft.com/en-us/azure/security/fundamentals/shared-responsibility
    you're responsible for endpoint protection and compliance
    Checked 2026-10-10.

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Security & PrivacyIn which cloud service model does the customer control the operating system but not the physical hardware?Security & PrivacyA developer deploys their own app on a provider's platform without managing servers or the operating system. Which model is that?Security & PrivacyWhat do you call a cloud made of two or more distinct clouds (private, community or public) bound by shared technology?

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