Good Day,

I have an issue with my VPN that i cannot figure out.

When i connect to the VPN using a mobile device using L2TP-PSK i have no issue and i can ping IP's on the lan and access the content.
However i cannot get a windows 10 pc to connect.

This is the message:
05:08:18 ipsec,info ISAKMP-SA established 192.168.1.250[4500]-165.255.x.x[4500] spi:1b187586fe4cf275:5e605235acd03099
05:08:53 ipsec,info purging ISAKMP-SA 192.168.1.250[4500]<=>165.255.x.x[4500] spi=1b187586fe4cf275:5e605235acd03099.
05:08:53 ipsec,info ISAKMP-SA deleted 192.168.1.250[4500]-165.255.x.x[4500] spi:1b187586fe4cf275:5e605235acd03099 rekey:1

Its does however get a little more strange:
I have 2 separate domains on the LAN.

If User-A who is registered on domain-A remotely connects to the VPN it authenticates and connects without any issues.
If User-B who is a member of domain-B tries to connect to the VPN it fails (as mentioned above). If I take User-B Laptop and make it a member of Domain-A on the LAN and then attempt to connect remotely it authenticates and connects without any issues.

I am using L2TP, with individual secrets.
I tried mschap2 disabled as well as mschap1 and mschap2 disabled.
I tried different DNS server ip addresses on each user secret (DNS of the respective domain server)
Mikrotik RouterOS 6.42.12
RouterBOARD 931-2nD r2