kolab automatically extending primary email address with number 2 like firstname.lastname2 at example.com which breaks config and setup in Kolab 3.16 and 3.4

[development_develissimo]

Hi kolab friends, 

its now the third time that kolab automatically changes the primary
email address of users in the following way: 

=> kolab automatically extending primary email address with number 2
like firstname.lastname2 at example.com which breaks config and setup. 

This happend to me with kolab 3.16 on Centos7 and with kolab 3.4 on
ubuntu 14.04. 

Can please someone explain to me, why this could happen? i did not
figure it out yet. 

thanks in advance - greetings to the whole kolab community! 

-- 
Development @ develissimo.com [1] 

Links:
------
[1] https://develissimo.com
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