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OWA 2010 to OWA 2007 redirect issue

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OWA 2010 to OWA 2007 redirect issue - 26.Sep.2013 5:53:24 AM   


Posts: 96
Joined: 24.Jan.2005
From: Copenhagen
Status: offline
Hi all

We are facing an issue regarding silent redirection of mailboxes from OWA 2010 to OWA 2007.

We have a mixed Exchange 2010/Exchange 2007 environment, and for the transition period of migration we wish to redirect OWA for mailboxes, that have not yet been moved, to OWA on the original Exchange 2007 server.

The internal and external DNS has been configured, and the Exchange 2007 CAS server ExternalUrl parameter has been populated with the correct legacy.domain.xx value.

In front of the Exchange 2010 CAS, a TMG 2010 server (providing FBA) is configured with two publishing rules, one for the OWA Url, and another for the Legacy Url.

OWA authentication on Exchange 2007 CAS is set to Basic.
OWA authentication on Exchange 2010 CAS is set to Basic.

When accessing OWA through TMG, redirection itself takes place - however, users must supply credentials twice:

1.First when accessing the new OWA URL on the Exchange 2010 CAS server
2.Then again, when accessing the legacy URL on the Exchange 2007 CAS server

The silent redirection works properly only when accessing OWA internally, and only when authentication is set to FBA on the Exchange 2010 CAS.

We are quite sure that the TMG publishing rules are configured correctly, however Exchange silent redirection brings up two authentication session when accessing OWA through TMG.

We use Exchange server 2010 SP3 RU2 Enterprise Edition and
Exchange server 2007 SP3 RU4 Enterprise Edition

Anyone have any idea?

Best regards
Post #: 1

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