Office 365 making some changes to SharePoint Online pages notification.

MC118086
Plan For Change
Published On : September 7, 2017

We’re making some changes to SharePoint Online pages running the classic user experience. We’re changing the default document mode of all classic pages to be Edge mode, instead of Internet Explorer (IE) 10 mode. This change does not apply to sites that are using custom theming, or sites that have the modern list experience disabled at the site or tenant level. This change will begin rolling out Tuesday, October 1, and will complete by the end of October.

How does this affect me?

For most users, this change will just increase performance and reliability of pages. However, some custom master pages or custom web parts may contain custom code that takes a dependency on the older IE10 document mode.

What do I need to do the prepare for this change?

If you have sites with this kind of customization, the sites can be reverted to use the IE10 document mode by doing the following:

1. Open the site in SharePoint Designer.
2. Edit the master page that is in use.
3. Find this line: <SharePoint:IECompatibleMetaTag runat="server" /> And replace it with: <meta http-equiv="X-UA-Compatible" content="IE=10"/>
4. Save the page and reload the site. Please click Additional Information to learn more about document mode changes.

Additional information

Published by Chirag Patel @techChirag

Chirag is an independent Microsoft 365 consultant at Patel Consulting, and Microsoft MVP (Office & Apps Services), based in UK with more than 20 years of industry experience. He is also a BCS (British Computer Society) Member & Chartered IT Professional, Microsoft 365 Certified Enterprise Administrator Expert, MCT (Microsoft Certified Trainer) and TOGAF9 Certified Architect. He works with a wide variety of clients in many sectors, designing and implementing business collaboration, data and information management solutions and services based on Microsoft Teams, SharePoint and Microsoft 365 technologies, Power Platform to create business value for both themselves and their customers, including UK Microsoft Gold Partners with deployment, upgrade and migration services delivery. Chirag is an active Microsoft 365 community participant, frequent speaker at local and international events including Microsoft 365 Saturdays, Power Saturdays, SharePoint Saturdays, Collab365, TeamsFest, Modern Workplace Summit and Scottish Summit. You can follow Chirag on twitter at @techChirag. View all posts by Chirag Patel @techChirag