According to the release of the new Microsoft team, SharePoint online Got in to a big problem. SharePoint online is down for last 18 days. today is 18th day that Microsoft SharePoint online is in to a big unknown problem (Office 365 support says) . that none of their specialist cant solve it yet (Office 365 Support says) . you might have problems such as unstable office online apps, losing data, and reed only status . issues on uploading files in SharePoint , teams and onedrive. if you have these problems let Microsoft know about it.