Forum Discussion
Two Exchange servers in one domain
Hello everybody,
I want ask you, because I can’t find how “Exchange magic” works.
I have two seperate Exchange DAG clusters in one domain, with different DNS records and different Virtual Directories URLs.
Servers are on two physically diferent locations, but we create a direct connection between two locations for migration mailboxes in near future.
We notice sometimes clients from old enviroment can connect through new enviroment and access to mailboxes on old servers.
How is it possible? What communication ongoing between old and new Exchange enviroments? Can somebody explain me specifically?
Thank you very much for answer to this mystery.
Hello! sie65
Are members in DAG1 and DAG2 ?
Hello,
yes, one set of servers creating together DAG1 and other set of servers, newer, creating together DAG2.
Hi sie65
Clients connect to the Client Access Services. It resolves on what Database the Mailbox is and what Server is responsible for that Mailbox Database and proxies the connection to the Backend Services.
https://learn.microsoft.com/en-us/exchange/architecture/architecture?view=exchserver-2019Kind Regards
AndresHello Andres-Bohren,
but I try to find how Exchange servers communicate between themselves.
I know how client can connect to Exchange server, but how client with mailbox in database in DAG1 can communicate through Exchange server from DAG2? Thats my problem, which I tried understand.Thank you
Intra exchange communication is a bit of a mystery. There are hidden connectors created with each new Exchange server installed into an organisation for intra-organisation communication (and you can only have 1 exchange organisation per forest/domain). Unless someone has more information, you just have to assume that all exchange servers will talk to all other exchange servers at some point.
One of the requirements for exchange server installation is that traffic between them is not blocked or altered, so that's a bit of a hint they will talk to each other:
