Hi there,

How to Load Test a SharePoint farm if it can support about 1500 users in my company?

Thank you so much.

You can test using Visual Studio. Refer to the following article for more ifnormation

https://msdn.microsoft.com/en-us/library/JJ710162.aspx?f=255&MSPPError=-2147217396

http://blogs.msdn.com/b/howie_hillikers_blog/archive/2013/06/26/web-performance-and-load-testing-sharepoint-2010-and-2013-applications.aspx

Also check this video

https://channel9.msdn.com/Events/SharePoint-Conference/2014/SPC381