2FA error:invalid TOTP code

2FA error:invalid_TOTP_code

Description

Following this wiki: https://wiki.zimbra.com/wiki/Zimbra_Two-factor_authentication

Step on which the error occur:

1. configure the WebUI = OK 2. install and config the OTP smartphone app = OK 3. finishing the config, enter the 6 digit code from the smartphone app to the WebUI = FAIL

Exception

We have the following exception in mailbox.log when configuring 2FA:

2017-06-12 08:14:24,190 DEBUG [qtp1068934215-180:https:https://server.in/service/soap/EnableTwoFactorAuthRequest] [name=user@domain.com;mid=9;ip=10.0.0.1;port=25641;ua=ZimbraWebClient - GC58 (Win)/8.7.9_GA_1794;] SoapEngine - handler exception: authentication failed for [user@domain.com], invalid TOTP code 
com.zimbra.cs.account.AccountServiceException$AuthFailedServiceException: authentication failed for [user@domain.com] 
ExceptionId:qtp1068934215-180:https:https://server.in/service/soap/EnableTwoFactorAuthRequest:1497235464190:2713fdd9f2f40... 
Code:account.TWO_FACTOR_AUTH_FAILED

Solution

Reason for the issue: time Synchronizing System Clock with Hardware Clock fixes the issue.