How to resolve blank screen issue Exchange 2010 SP1 rollup 3/4

Today I found an issue which is pretty common if you search on the internet that the Outlook web Access shows a blank screen instead of the normal logon page. “Blank OWA Screen after installation of Rollup 3 or 4 of exchange 2010 SP1” [ note rollup 4 isn’t available for download anymore due bug […]

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