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c# - How to resolve "The server does not support the control. The control is critical." Active Directory error

When trying to get all users from AD based on a role I was getting the exception:

System.DirectoryServices.Protocols.DirectoryOperationException: The size limit was exceeded

With help of this thread : LdapConnection SearchRequest throws exception for “The size limit was exceeded I tried implementing paging.

Now I am getting an exception:

The server does not support the control. The control is critical.

Any ideas on how to go about resolving it? I get a smaller list of role based users fine without paging. Thanks.

UPDATE: I found code to check if paging is supported by AD here iPlanet LDAP and C# PageResultRequestControl and I got the result that paging is supported.

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It is true that it helps to change from AuthType.Basic, but in case anyone wants to get it working with AuthType.Basic then you need to make sure to set LDAP protocol version to 3:

var connection = new LdapConnection(new LdapDirectoryIdentifier(server), null, AuthType.Basic);
connection.Bind(new NetworkCredential(username, password));
connection.SessionOptions.ProtocolVersion = 3;

I found this solution here: https://groups.google.com/d/msg/microsoft.public.active.directory.interfaces/x1ZiixXknqk/m7-Li21QBoIJ


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