The classic site collections page was removed on 1/1/21 – Folks, have you noticed that we know more open the classic site collection page link from SharePoint Admin Center? Today when I logged into my trial tenant I could see the message – “This page was removed on 1/1/21. Learn where to find features from this page.” which means the Classic site collections page was removed on 1/1/21 from the SharePoint Admin center dashboard so after 1st January 2021 if we login into the SharePoint Admin center (https://globalsharepoint2020-admin.sharepoint.com/_layouts/15/online/AdminHome.aspx#/classicFeatures) dashboard we could see that no longer we can navigate to the classic site collection page, we can see the below message :

If we notice on the above page under the classic site collection page, the “Open” button is disabled.
Classic site collections page in SharePoint Admin Center
By default SharePoint, Admin center page is open in modern SharePoint view – which means if we want to create a site collection in SharePoint Admin Center that will be created in modern SharePoint, however, before 1st January 2021 if we wanted to create a classic site collection we had that option from SharePoint admin center page. To create a classic site, select Other options. Site address boxes appear after you begin entering a site name. Site address boxes appear after you begin entering a site name.
On the other hand, to create a modern site collection in the modern new SharePoint admin center, we need to go to the Active sites page, and then select Create.
See Also: Classic site collections page
You may also like the below Microsoft 365 Roadmap articles:
- New Feature: Manage how long guests can access SharePoint Online and OneDrive documents
- (Updated) New Feature: Cumulative analytics for SharePoint hubs in Office 365
- Reminder: SharePoint – Classic popularity reports to be retired – Office 365
- Retiring SharePoint 2010 Workflows from office 365 tenant – What should we do?
- How to turn on inline message translation in Microsoft Teams?
- Microsoft Teams: Teams Meeting support for 20,000 attendees
- Office 365: Cortana voice assistance in Teams mobile
- Set default page template in SharePoint online site (Microsoft 365 Roadmap ID 64529)
- Microsoft 365 roadmap