The Exchange 2010 install of the CAS role includes the installation of the legacy Exchange Virtual Directories. The Exchange, Public and Exchweb Virtual Directories are placed and configured direct...
Updated Jul 01, 2019
Version 2.0
Blog Post
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How to recreate the legacy Exchange Virtual Directories in Exchange 2010?
More than likely there is another configuration in the applicationhost.config file or another web.config file in place that causing conflict and ultimately the /public to fail.
Check through the web.config file under the OWA Directory and check the applicationhost.config file to ensure that the section on /public only has the authentication mechanisms and entries as listed above.
Compare it to the /exchweb, they should be the same.
Check through the web.config file under the OWA Directory and check the applicationhost.config file to ensure that the section on /public only has the authentication mechanisms and entries as listed above.
Compare it to the /exchweb, they should be the same.