We are using SuiteCRM 7.2.10 community version for our backend. We are using basic NTLM for authentication which is not very secure. We can do OTP based 2nd factor validation as we have SMs sending capability, but we are not sure how SuiteCRM will implement that. We do not have the option to upgrade due to business constraints but can use plugins if required. Is there any other way that can be used in suiteCRM for authentication such as a 2FA scheme?
You can repair 2FA which is in SuiteCRM.
Look at the files in the directory
I did this a few years ago.