Greetings all;
Recently I've purchased Office365 for our business. I currently have an on-premise Exchange 2007 server, it's about 6 years old, and instead of replacing hardware and upgrading Exchange I think moving to the cloud will be great for us.
Reading through some documents about migration roadmaps from Microsoft, they suggest setting up a VM on Azure and using DirSync from there. This sounds like a good idea, and for testing (and disaster recovery) I decided to try it. I created a Site-To-Site VPN and got it working, and I created a 2012 R2 VM. I as able to replicate DNS and run dcpromo, and the VM is now a Domain Controller/GC.
Here is where the issue is though. Right now I have 2 sites. My Main Site (I'm going to call it SiteA), a remote site in another state (SiteB). SiteB is connect via a Site-to-Site vpn and they have a...