You can block applications on your network from being run with something called a hash rule, these can be deployed with group policy. Here is a step by step guide on blocking applications on your network.
When installing exchange 2003 service pack 2 you see the following error – Setup failed while installing sub-component Exchange ActiveSync with error code 0xC0070643.This is a problem with MSXML3. Solution inside.
When you try and create a new maiblox in Exchange 2007 or Exchange 2010 you get the following error Property expression “Administrator” isn`t valid.Valid strings are.Strings that includes `@` cannot be the last character. Here is the solution