What happens when your master page doesn't meet the site definitions?

Will it still render correctly?

Currently my master has the blue 'i' icon and doesn't meet site definitions. But still looks okay.


SharePoint pages are, by default, associated with site definition files. When a master page is customized in SharePoint Designer 2010, it is no longer associated with the site definition. This can result in additional administrative work following future updates or upgrades to SharePoint, which is why you see this message. You can always reset the master page to its site definition, if necessary.

Source: https://support.office.com/en-us/article/Customize-a-master-page-to-brand-your-site-0A57B837-4C97-4AF9-A088-FEDF3DFD1DD5

  • 1
    So what is that additional work? (I always click Yes but never understood what I was doing) – Danny '365CSI' Engelman Nov 25 '15 at 7:47

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.