Unable to use Enterprise Vault Office Mail App in Outlook 2013 has been created
We cannot get the Enterprise Vault Office Mail App to work in Outlook 2013 to work internally.
It works fine in Outlook Web App, but not the Outlook client.
When opening a message in Outlook and then clicking the Enterprise Vault button in the message results in Initialization failed. Searching through the IIS, & EWS logs on our Exchange servers turned up this error when the app is trying to connect:
Microsoft.Exchange.Security.OAuth.InvalidOAuthTokenException: The hostname component of the audience claim value is invalid. Expected ''internal.site.com''. Actual ''external.site.com''.\r\n at Microsoft.Exchange.Security.OAuth.OAuthTokenHandler.ThrowIfFalse(Boolean condition OAuthErrors inboundError Object[] args Exception innerException String logPeriodicKey)\r\n at Microsoft.Exchange.Security.OAuth.OAuthTokenHandler.ThrowIfFalse(Boolean condition OAuthErrors inboundError Object[] args)\r\n
Our internal DNS name for Exchange is internal.site.com
Our external DNS name for Exchange is external.site.com
In our internal DNS, internal.site.com & external.site.com both resolve to the same load balanced IP address using A records.
In our external DNS, external.site.com resolves to a TMG 2010.
Our Exchange servers are load balanced using a Citrix Netscaler.
