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Is IISxpress compatible with 32 bit and 64 bit versions of IIS?

April 26, 2017bit compatible IIS iisxpress versions

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Is IISxpress compatible with 32 bit and 64 bit versions of IIS?

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Yes, but you need to know what mode IIS is running in first. On 32 bit operating systems you should only install the 32 bit version of IISxpress. On 64 bit versions of Windows you need to know which mode your IIS installation is configured to use. If it is running in 32 bit mode then you should use the 32 bit version of IISxpress, if it is running in 64 bit mode then you should install the 64 bit version. If you change the ‘bitness’ of your IIS installation after installing IISxpress then you will need to uninstall IISxpress and install the other version for it to function properly again.