Exchange slow down with proxy software ???

My Proxy software requires me to enable DNS in the TCP/IP setting of each
client on the network. The IP of the dialing computer must be entered into
the DNS search order list.

However, when I do this Outlook takes A long time to connect to the
Exchange server, and keeps timing out.

It seems like the TCP/IP can't cope with both. Or maybe the client
machines are having trouble locating the Exchange server because of
enabling the DNS.

Can any Exchange experts help me.
I would greatly apreciate it.

Kind Regards,
Andy_

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