You can see this information from the server log:
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2019-04-05 11:10:00.319 SSTP PPP Session [xxx.xxx.xxx.xx:55743]: Trying to request an IP address from the DHCP server.
2019-04-05 11:10:05.319 SSTP PPP Session [xxx.xxx.xxx.xx:55743]: Acquiring an IP address from the DHCP server failed. To accept a PPP session, you need to have a DHCP server. Make sure that a DHCP server is working normally in the Ethernet segment which the Virtual Hub belongs to. If you do not have a DHCP server, you can use the Virtual DHCP function of the SecureNAT on the Virtual Hub instead.
2019-04-05 11:10:13.501 SSTP PPP Session [xxx.xxx.xxx.xx:55743]: The VPN Client sent a packet though an IP address of the VPN Client hasn't been determined.
2019-04-05 11:10:13.501 SSTP PPP Session [xxx.xxx.xxx.xx:55743]: A PPP protocol error occurred, or the PPP session has been disconnected.
When I try to connect from a windows box using SSTP, I am getting the following information from the packet log:
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-04-05,11:09:52.450,SID-LOCALBRIDGE- 1,-,A4580F42CBB6,FFFFFFFFFFFF,0x0800,358,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=350047519 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:09:53.199,SID-LOCALBRIDGE-1,-,001A4A160154,FFFFFFFFFFFF,0x0800,348,DHCPv4,Response,10.1.1.24,bootps(67),255.255.255.255,bootpc(68),-,-,TransactionId=350047519 ClientIP=0.0.0.0 YourIP=10.1.2.253 ServerIP=10.1.1.24 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:09:53.199,SID-LOCALBRIDGE-1,-,A4580F42CBB6,FFFFFFFFFFFF,0x0800,370,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=350047519 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:09:53.199,SID-LOCALBRIDGE-1,-,001A4A160154,FFFFFFFFFFFF,0x0800,348,DHCPv4,Response,10.1.1.24,bootps(67),255.255.255.255,bootpc(68),-,-,TransactionId=350047519 ClientIP=0.0.0.0 YourIP=10.1.2.253 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:09:53.210,SID-LOCALBRIDGE-1,-,001A4A16017B,FFFFFFFFFFFF,0x0800,348,DHCPv4,Response,10.1.1.23,bootps(67),255.255.255.255,bootpc(68),-,-,TransactionId=350047519 ClientIP=0.0.0.0 YourIP=10.1.2.203 ServerIP=10.1.1.23 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:09:56.159,SID-LOCALBRIDGE-1,-,001A4A16017B,FFFFFFFFFFFF,0x0800,348,DHCPv4,Response,10.1.1.23,bootps(67),255.255.255.255,bootpc(68),-,-,TransactionId=2306803456 ClientIP=0.0.0.0 YourIP=10.1.2.112 ServerIP=10.1.1.23 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:10:00.400,SID-GIL.COMEAU-[SSTP]-4,-,CA20658C6E7E,FFFFFFFFFFFF,0x0800,335,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=3970409621 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,xxx.xxx.xxx.xx,-
2019-04-05,11:10:01.932,SID-GIL.COMEAU-[SSTP]-4,-,CA20658C6E7E,FFFFFFFFFFFF,0x0800,335,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=3970409621 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,xxx.xxx.xxx.xx,-
2019-04-05,11:10:03.516,SID-GIL.COMEAU-[SSTP]-4,-,CA20658C6E7E,FFFFFFFFFFFF,0x0800,335,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=3970409621 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,xxx.xxx.xxx.xx,-
2019-04-05,11:10:04.084,SID-LOCALBRIDGE-1,-,001A4A16017B,FFFFFFFFFFFF,0x0800,348,DHCPv4,Response,10.1.1.23,bootps(67),255.255.255.255,bootpc(68),-,-,TransactionId=2306803456 ClientIP=0.0.0.0 YourIP=10.1.2.112 ServerIP=10.1.1.23 RelayIP=0.0.0.0,-,-,-
2019-04-05,11:10:05.076,SID-GIL.COMEAU-[SSTP]-4,-,CA20658C6E7E,FFFFFFFFFFFF,0x0800,335,DHCPv4,Request,0.0.0.0,bootpc(68),255.255.255.255,bootps(67),-,-,TransactionId=3970409621 ClientIP=0.0.0.0 YourIP=0.0.0.0 ServerIP=0.0.0.0 RelayIP=0.0.0.0,-,xxx.xxx.xxx.xx,-
One issue that I think is causing the issue is the relay address from the DHCP lease that should be returning the ip address is not correct (0.0.0.0). But I am not sure how this should be configured on the SE server side.
I have been banging my head on tsome time for sometime about this and was hoping to find someone who has completed a simliar setup for a bit of help.