In this video, you will learn how to troubleshoot the issue of SharePoint sites timing out or becoming unavailable in Office 365 for enterprises.
"This issue may be caused when an Office 365 administrator deletes the root SharePoint site collection for the site you are trying to access. To resolve this issue, you must recreate the deleted root SharePoint site collection. In this video, we'll show you how to determine if your root SharePoint site collection was deleted and how to recreate it," stated Microsoft.
- SharePoint Online Administration
- Site collections
- A URL that resides under a SharePoint root site collection is broken after the root site collection is deleted
Here is the video: