According to our project requirements, We need to create more than 2000 subsites under single site collection in SharePoint online (Office 365).
MSDN article says that you can create Up to 2,000 subsites per site collection. https://support.office.com/en-us/article/SharePoint-Online-software-boundaries-and-limits-8f34ff47-b749-408b-abc0-b605e1f6d498
While this article says that you can create Up to 100,000 subsites per site collection. http://geekswithblogs.net/ThorvaldBoe/archive/2015/12/18/finding-the-maximum-number-of-sub-sites-in-sharepoint-online.aspx
So exactly how many subsites can we create?