Microsoft has started the rollout to New theming for additional SharePoint Online site templates.
Microsoft is enabling the modern site teaming experience for all site templates.
If you are a Tenant Admin you should have received the following email with information to prepare for this change.
|Organization: NUNO SILVA|
|Updated feature: New theming for additional SharePoint Online site templates|
|Major update: General Availability rollout started|
|Applied to: All customers|
|In early April 2018, we will begin enabling the modern site theming experience for all site templates. Currently, it’s only available for Group-connected team and communication sites. This new theming model incorporates the latest site theming capabilities and improves overall performance of applying themes.This message is associated with Office 365 Roadmap ID: 27252.
[How does this affect me?]
We’ll be gradually rolling this out to Targeted Release organizations in early April, and we anticipate rollout completion in early May.
[What do I need to do to prepare for this change?]
If you change the theme for a site and notice any issues, you can opt out of the change by using Microsoft PowerShell, and re-apply any themes that were changed.
To learn more about the option to opt-out, please click here.
If you want to learn more about this change, continue reading here https://techcommunity.microsoft.com/t5/SharePoint-Blog/New-site-theming-options-for-SharePoint-sites-in-Office-365/ba-p/94001