Traffic between a remote site, Internal, and Eth3

I have just started at a new job where UT is being used. I have prior experience with UT, but this one has me stumped.
We have two offices. Both offices have a vendor supplied router that provides a VPN between the offices.
Office A:
External - x.x.x.x (external address)
Internal - 10.31.73.2/24
Static Routes:
10.32.97.0/24 to 10.31.73.1 (vpn router)
192.168.1.0/24 to 10.31.73.1
192.168.3.0/24 to 10.31.73.1

Office B:
External - x.x.x.x (external address)
Internal - 10.32.97.2/24
DMZ - 192.168.3.1/24
ETH3 - 192.168.1.1/24
Static Routes:
10.31.73.0/24 to 10.32.97.1 (vpn router)

Both UT boxes are running OpenVPN for remote users.
Windows servers exist on the Internal interface at both offices
A Windows server exists on ETH3 in office B

The problem is that Active Directory Replication is failing between Office B/ETH3 and Office A/Internal
I need to have Office A/Internal, Office B/Internal and Office B/ETH3 passing all traffic to each other.
Pings are working and show the traffic is being routed, but RPC traffic appears to fail from Office B/ETH3 to Office A/Internal

According to the folks here, this all worked until they upgraded to UT 10 from UT9 at office B
When the upgrade was done the failures started.
When we swap back to the UT9 at Office B it starts working again.

As a Test I set a specific pair of Bypass Rules to pass traffic from the server in Office A/Internal and the Server in Office B/ETH3. Replication started working. That is all well and good but other issues between these network segments are still happening. I need to pass ALL traffic between these 3 with no blocking, no filtering, etc....

Any suggestions?