Fortinet DNS -> Windows server domain controller

[au63ly]

Hi, Trying to manage workstations within a domain controller (windows server), to run DC it is necessary to run also DNS in Windows server but I'm using Fortinet as a master DNS in local network, is it somehow possible to add users to domain without specifying Windows DNS as a DNS in Windows clients ? Created DC domain e.g. ad.example.comAdded SRV records (LDAP,KERBEROS), A record to Fortinet DNS, can resolve them:host -t SRV _kerberos._udp.ad.example.com. _kerberos._udp.ad.example.com has SRV record 1 100 88 ad.example.com.host -t SRV _ldap._tcp.ad.example.com. _ldap._tcp.ad.example.com has SRV record 1 100 389 ad.example.com.host -t SRV _ldap._tcp.dc._msdcs.ad.example.com. _ldap._tcp.dc._msdcs.ad.example.com has SRV record 0 100 389 ad.example.com.host -t A ad.example.com ad.example.com has address 10.0.0.9 After adding workstation to domain i get error:DNS was successfully queried for the service location (SRV) resource record used to locate a domain controller for domain "ad.example.com":The query was for the SRV record for _ldap._tcp.dc._msdcs.ad.example.com The following domain controllers were identified by the query: ad.example.comHowever no domain controllers could be contacted Is there any solution ?? TY for all answers