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Friday, September 02, 2011

UAG Exchange 2010 OWA Error_Code=51 has resulted in too many redirects

Summary: After rebooting UAG servers, you receive the following error in your browser when attemping to access has resulted in too many redirects.

Root cause: In this instance every time the UAG is rebooted (in our case montly windows patch) one UAG box failed to start the internal site in IIS. If you start the site or run "activate" in the UAG console, OWA will work.

What is happening is that UAG accepts the Outlook anywhere request, and does an internal redirect to its own “internal site”. This is normal, as the InternalSite, listening on port 6001, is UAG’s administrative engine (handles login, authentication, errors etc).

Root fix: There is an error event that comes up after we patch on UAG2 that doesn’t occur on UAG1 even though they are configured and patched exactly the same.

Event id 107
Report Server Windows Service (ISARS) cannot connect to the report server database.

Two services were stopped on UAG2 below. It appears one service is starting before the other “SQL Server Reporting Services (ISARS)” before “SQL Server (ISARS)”.

Set the dependency in the registry.

“SQL Server Reporting Services (ISARS)” Depend on service “SQL Server (ISARS)”

James Chong
Security+, Project+, ITIL
xml:lang="en" lang="en"> MS Exchange Tips: September 2011