I have a 2003 Active Directory. with 2003 domain and forest level. I am putting a W08R2 server on the domain and promoting it to DC.
The r2 is in a remote office which is connected to main office (HQ) and DC by a firewall ipsec vpn that works fine.
On the 2003 DC I created the Sites and subnets.
I joined the r2 to the domain making i a member server
I ran the adprep32 /forestprep and adprep32 /domainprep and adprep32 /domainprep /gprep from the r2 files from the 2003 DC. All completed okay.
On R2 I added the AD DS from roles. Then ran dcpromo. It was installing dns and gc role and syncing and updating from ad schema, then I get the error attached. "The RPC server is unavailable" and then fails.
I am logged on and using the administrator account that is a member of the domain/ enterprise/ schema administrators group.
The DNS1 on the R2 server is pointing to the DNS server in HQ. and pinging okay.
On the r2 server in services.msi I can connect to another computer and select the DC in HQ no problem
I added the below reg entry as a fix for my problem
1.Start Registry Editor.
2.Locate and then click the following registry subkey:
Note If the Parameters key does not exist, create it now.
3.On the Edit menu, point to New, and then click DWORD Value.
4.Type MaxPacketSize, and then press ENTER.
5.Double-click MaxPacketSize, type 1 in the Value data box, click to select the Decimal option, and then click OK.
6.Quit Registry Editor.
7.Restart your computer.
This was to force Kerberos to use TCP instead of UDP in Windows but did not work, even a QWORD entry as it’s 64bit.
This did not work as in the packets where still in UDP (checked sessions on my fortigate firewall.)
So I am stuck and need some expert help. I will be watching replays so will give a quick reply,