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By wrapping normal Outlook RPC requests in HTTPS the connections are able to traverse firewalls over the common SSL/HTTPS port without requiring the RPC ports to be opened.
There are three main tasks to deploy Outlook Anywhere in an Exchange environment: Client Access, and select the Client Access server you want to enable for Outlook Anywhere.
If joining a workgroup, choose another workgroup name.
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Verify that the network path is correct and the destination computer is not busy or turned off.