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?]
After the rollout is complete, the new site theming experience will be available on classic site templates. A new site theming panel will be available, empowering site owners to easily apply one of the new themes to all pages of the site by selecting the theme of their choice.

Classic sites that do not use SP JavaScript will render un-themed if the site theme is changed. If you would like to maintain custom themes on classic sites, as administrator, you can opt out of the new theming experience by using Microsoft PowerShell.

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 wish to take advantage of the new SharePoint Online site theming, there is no action you need to take. The new setting will show up in the site settings gear menu as “Change the look” for each site.

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.
For more information on SharePoint Online site theming, please click Additional Information below.

You can configure the default SharePoint themes, adjusting the Main and Accent colors.You can configure the default SharePoint themes, adjusting the Main and Accent colors.

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

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