Is outsystems support multiple active directories? If yes how we can apply multiple active directories without writing external plugin.

Hi Lovish Goyal,

You do not have to write an external plugin if it is already available, see here how to apply an active directory: 

https://success.outsystems.com/Documentation/11/Managing_the_Applications_Lifecycle/Secure_the_Applications/Use_an_External_Authentication_Provider

Regards,