Exchange 2013 Exchange Admin Center
Within the Exchange Admin Center (ecp) there are options for setting Basic Authentication that will propagate through the entire Exchange system.
Go to Servers/Virtual Directories and do this for Autodiscover and EWS
- Select the pencil to edit
- Select Authentication and check Basic authentication to enable that option.
- Important: Make sure Basic Authentication is enabled for EWS and Autodiscover on each CAS server.
- Press Save.
Exchange 2010 & 2013 Exchange Management Shell
You can verify that the settings were properly enabled with this kb: Determining if Basic Authentication Is Enabled on Your Network
You can modify these values from the Exchange Management Shell.
For EWS use the script of the form:
Set-WebServicesVirtualDirectory -Identity <VirtualDirectoryIdParameter> [-BasicAuthentication <$true | $false>]
Example:
Set-WebServicesVirtualDirectory -Identity “EWS (Default Web Site)” -BasicAuthentication $true
For autodiscover use the script of the form:
Set-AutodiscoverVirtualDirectory -Identity <VirtualDirectoryIdParameter> [-BasicAuthentication <$true | $false>]
Example:
Set-AutodiscoverVirtualDirectory -Identity ‘autodiscover (Default Web Site)’ -BasicAuthentication $true
Resetting IIS
It may be necessary to reset IIS for the new setting to take. Restarting IIS