HTTP Form Based Authentication with Microsoft Exchange 2003
March 20th, 2009
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By default, Form Based Authentication requires SSL to be configured on your IIS but there is a way around it.
Here are the steps to configure FBA to work without SSL:
- Open Registry Editor (regedit.exe)
- Navigate to the following registry key: HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeWeb
- Under the OWA subkey, add a DWord value called AllowRetailHTTPAuth and set its value to 1 (it doesn’t matter if you have decimal or hexadecimal selected).
- Quit Registry Editorand restart IIS services. You do not need to restart the whole server for this change, just IIS.
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