In Microsoft Exchange environment, Autodiscover is a key feature that allows Outlook clients to discover their mailbox automatically while creating Outlook profile. AutoDiscover endpoint is created in Active Directory for each CAS (Client Access Server) installed in the environment. Domain joined clients will use SCP entries of the Active Directory to locate the AutoDiscover URL. In some instances we may have to block clients from using SCP lookup to automatically configure Outlook. Once we block SCP lookup, Outlook will determine the AutoDiscover URL using autodiscover.domain.com domains. This article shows you how to disable Autodiscover SCP lookup using Windows Registry.
Service Connection Point (SCP) in Exchange
To view the SCP entries, open Active Directory Sites and Services → expand Services from the console root →. Microsoft Exchange → Organization Name → Administrative Groups → Exchange. Administrative Group → Servers → select the CAS server and expand → Protocols → AutoDiscover →. Right click on the Server Name in the right panel and click Properties as show below.
Disable Autodiscover SCP Lookup using Windows Registry
In order to disable SCP lookup from windows registry, open Registry Editor and navigate to the following registry path.
<Office_Version> depends on your version of office installed as seen in the below table.
|Version Name||Version Number|
Once you browse to the above registry path, right click on empty space in the Right pane → New → select “DWord Value” as shown below.
Name the new Dword as ExcludeScpLookup now double click on the newly created DWord to edit its value, set Value to 1 and then click OK as shown below.
You can also copy the below code to a text file, rename it with .reg extension and double click to merge with your registry. Make sure that you replace the version number X.0 by referring the table above.
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\X.0\Outlook\AutoDiscover] "ExcludeScpLookup"=dword:00000001
In this way you can disable Autodiscover SCP lookup using Windows Registry.
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