Is outsystems support multiple directory? In multi tenancy if we have two or more active directories then how to use them through outsystems?

It's certainly possible. You would need to do it programmatically, and you might be able to use one of the available Forge components to help.

If you want more specific answers, you'll need to provide additional information about your use case and what exactly you are trying to accomplish (login via AD, access other information stored in AD, whether this is Azure AD, or on-prem AD, etc.).

Would also be helpful when you ask questions on the forum to include the version of the platform you're on, and what version of Service Studio you are using (if the question is related to SS specifically).