While installing ISA or TMG Enterprise Edition the installation might fail with the following error
Setup failed to connect to the specified configuration storage server computer. This may be because the local computer needs to be added to the Replicate configuration storage server computer set. Error code = 0x8007203a
On TMG the error will look like this
On ISA 2006 like this
To solve this error make sure that the “ISASTGCTRL” Service is Started on the the current Configuration Storage Server.