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  • Status: Solved
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Global Catalog Connections

We have about 25 branch location, which each location has a Windows DC configured as a Global Catalog server.  At the OPS center we obviusly have the Exchange server and a DC/GC.  Using TCPView, we have noticed that when we open Outlook it establishes a connection to one of our branch servers instead of our local server.  I am assuming this is a connection to the remote Global Catalog service.  Why would it be connecting to a remote server instead of the local, and how can we make sure all clients connect to their local GC server?

2 Solutions
Sunil ChauhanExpertise in Exchange Server, Office 365 & Powershell ScriptingCommented:
Hi, you need to bind subnets in sites and services to make sure clients do not coross boundirs to resolve this.

it's very important you define a site topology in order to fix this, normally you add all the subnets your using in sites and services and then allocate these subnets to a site. By default all subnets belong to the default_first_site_name site and you get the kind of behaviour your experiencing.

Review the following technet article for additional information


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