Hello, 

I wish to get access to AWS FSX Windows File server using my zoho corporate email credentials. 
This can be done by creating user identity pools using AWS Cognito. 

I am stuck at first step of selecting authentication access type & I am given few choices as shown in the screenshot. 

Which one of the auth method I should choose for my zoho email id employee access? (Please refer to the screenshot)

ref. 

ref https://aws.amazon.com/fsx/windows/