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External Users Unable to Access MS Exchange Email After Integration of MS OWA with OAM (Doc ID 1097491.1)

Last updated on MARCH 08, 2017

Applies to:

COREid Access - Version: 10.1.4 and later   [Release: 10g and later ]
Information in this document applies to any platform.


External users are unable to set up or access their Microsoft (MS) Exchange mail accounts since MS Outloook Web Access (OWA) was integrated with Oracle Access Manager (OAM). MS Exchange is accessed using using RPC over HTTP.

Error: The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.

OAM-integrated OWA access is working without issues. 

Internal intranet users can access their MS Exchange mailbox without issues.

If the OAM Policy Domain protecting /owa access is disabled the problem no longer occurs.

If WebGate is removed from the IIS webserver hosting MS OWA and Exchange the problem no longer occurs.

Steps to reproduce

1. Start -> Control Panel -> Mail -> Mail Setup -> E-mail Accounts -> Add New E-mail Account -> type=MS Exchange.
2. Create an account for username e.g. idmtest.
3. Configure the account to connect to MS exchange using HTTP.
4. External users change the mail proxy settings to use the externally accessible MS Exchange proxy URL. 
5. Save the settings: user sees login popup for Basic Authentication. This is expected because in the IIS webserver security settings for /rpc folder Basic Authentication option is checked.
6. Enter valid credentials, the following error occurs:

'The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.'

If an invalid password is entered in the basic login popup then the popup is re-displayed, so IIS basic authentication appears to be executing correctly.


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