How can I know which version SharePoint I am using and onPrem or Online

Question

I am using SharePoint I want to know the version like 2015, 2019 and is it SP Online or SP onPrem.

How can I know this information without assuming like, guessing from UI and menus. Just I want to see it clearly?

When I click on ? icon

Answer 1

If you don't have an access to SharePoint Administration Center or any SP server, click on ? on SharePoint homepage.

You will see a version number in Help window

If you have an access to SharePoint Admin Center, Login to Admin Center, navigate to Servers in Farm section, you will see build version of installed SharePoint. And then you can google build version or check it on this site.

Also you can execute PowerShell command -

$farm = Get-SPFarm
$farm.BuildVersion

Answer 2

Here're some references about methods to check SharePoint version for you:

Which version of SharePoint am I using?

How to Check Your SharePoint Version?