Zeta Alliance - Maldua Zimbra OSE 2FA Extension
The Zimlet gallery is the best place to find and publish extensions for Zimbra.
Two-Factor Authentication for Zimbra Open Source Edition – Ahmad Imanudin
Zimbra Two-factor authentication - Zimbra :: Tech Center
Zeta Alliance - Zimlets
Two-Factor Authentication for Zimbra Open Source Edition – Ahmad Imanudin
Zeta Alliance - Zimlets
How to enable dual authentication factor in Zimbra (2FA) – bTactic Open Source&Cloud Solutions
Did You Know? Zimbra Two-Factor Authentication (2FA) - Zimbra : Blog
GitHub - Zimbra-Community/zimbra-foss-2fa: Two factor authentication for Zimbra Open Source (beta)
ZM-S06S Zoloat Early Production Type
Zeta Alliance - Zimlets
Zeta Alliance - ItemTypes
How to setup External Active Directory Authentication
Zeta Alliance - Users