FG-401: DNS resolution issue under VPN SSL forticlient

Hi all,
 
I notice a problem of resolution dns when I am connected in vpn ssl with the forticlient.
 
when I do nslookup myserver.mydomain.fr  I receive an answer  like myserver.mydomain.fr.my-other-domain.com
 

PS C:\WINDOWS\system32> nslookup srv1.mydomain.fr
Server: AD1.mydomain.fr
Address: 172.16.29.21

Non-authoritative answer:
Name: svr1.mydomain.fr.my-other-domain.com
Address: 94.18.6.254

 
But the server 172.16.29.21 work fine when I'm connected through openVpn or directly on the company network
 
Can you help me please?
 
Thanks