Basically we have a Main Site Exchange 2013 with CAS and Mailbox Roles and supposedly all users connect to this exchange from their Outlook.
Now we installed an other Exchange 2013 at the DR site.. Our main office and the DR site are connected with a Layer2 bridge so the two exchanges are joined to the same domain and are also on the same network subnet. So the two Exchange servers have one network card on each of them which is the LAN/Domain network.
We created the DAG and the replication of the DBs works fine.. but the issue that we are currently facing is that some users are connecting directly to the DR Exchange from our Main office with their Outlook which is not what we would like to have.. We want that the DR hosts a copy of the DB and is activated only if some issues arise at the main site and we have to switch everything on the DR site manually.
We noticed this issue when we went to check the connection status on their Outlook and noticed that the Proxy server that they are connected to is the DR exchange.
Any idea on how can we solve this issue please?
Best Answer
Exchange is AD site aware. You need to put the two sites in to separate AD sites. Then have unique URLs for each site. The clients will then connect to the server located in the same AD site as their mailbox, rather than going across the WAN. At the moment Exchange doesn't know it is on two different sites, so is treating everything as one big LAN. I expect you will also find that Windows machines are using domain controllers in the other location as well - unless you have done some firewall tricks to stop it (rather than using sites and services properly).