ISO 27017, ISO 27018 and ISO 27001

Answer: ISO 27017 and ISO 27108 only provide recommendations and guidelines to the implementation of controls of ISO 27001 Annex A, so their application is not mandatory for an organization to be compliant with ISO 27001.

These articles will provide you further explanation about ISO 27017 and ISO 27018:
- ISO 27001 vs. ISO 27017 – Information security controls for cloud services https://advisera.com/27001academy/blog/2015/11/30/iso-27001-vs-iso-27017-information-security-controls-for-cloud-services/
- ISO 27001 vs. ISO 27018 – Standard for protecting privacy in the cloud https://advisera.com/27001academy/blog/2015/11/16/iso-27001-vs-iso-27018-standard-for-protecting-privacy-in-the-cloud/

Regarding if you can skip cloud elements until the implementation of ISO 27001, you can only do that if there is no cloud-related elements on your ISMS scope.

These articles will provide you fur ther explanation about scope definition:
- How to define the ISMS scope https://advisera.com/27001academy/knowledgebase/how-to-define-the-isms-scope/
- Problems with defining the scope in ISO 27001 https://advisera.com/27001academy/blog/2010/06/29/problems-with-defining-the-scope-in-iso-27001/

These materials will also help you regarding scope definition:
- Book Secure & Simple: A Small-Business Guide to Implementing ISO 27001 On Your Own https://advisera.com/books/secure-and-simple-a-small-business-guide-to-implementing-iso-27001-on-your-own/
- Free online training ISO 27001 Foundations Course https://advisera.com/training/iso-27001-foundations-course/