2-steps authentication on Exchange mail server

Dear Experts, is there any solution for 2-steps authentication on Exchange on-premise server?

Many thanks!
TjnoNetwork AdministratorAsked:
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Brandon DubeDirector of ITCommented:
Check out Duo, it can be used for many things and has really good end user experience. https://duo.com/docs/owa

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IvanSystem EngineerCommented:

we are using ESET 2FA. https://www.eset.com/int/business/endpoint-security/two-factor-authentication/

Easy to install, uses key generated on mobile app (or sent via SMS if you have some old phones), can be configured for OWA or ECP (just one or both), as well as not to be used from inside the LAN so that users have to use it only when accessing via Internet (that is how we have configured it, to simplify things).

AmitIT ArchitectCommented:
ISA or TMG was used to be MS product. However, MS stopped it. You can look for 3rd party tool or check this also:
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Seth SimmonsSr. Systems AdministratorCommented:
did you not get any help the last time you asked this question?

nothing has changed; still limited to web services
TjnoNetwork AdministratorAuthor Commented:
Hi Seth, we are looking for a cheaper solution, seems like Duo and ESET still is expensive
carlos sotoIT AdministratorCommented:
if you use office 365, you can add a license and use Azure MFA for multifactor
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