After changing port number from 5555 to 80, our CRM 4.0 web services page cannot open. We were experiencing failure of CRM WebServices. Cannot connect to CrmService.asmx nor CrmServiceWsdl.aspx. Other services were fine, such as discovery services and metadata service. The error we got was "Invalid URI: The hostname could not be parsed". We tried to find a resolution online, but no luck.

Using "Download Web Service Description Files" under settings - customization, got a generic error.

Thanks for Lyfe Langmead, the resolution is:

1. Download this tool: http://www.microsoft.com/downloads/details.aspx?FamilyID=6e211231-30fe-4df2-9b81-15cfb87adcf1&displaylang=en#filelist and put the contents in C:\prog files\Dyn CRM\Tools

2. Open a command prompt with admin privs and browse to that dir and run the following commands...

    microsoft.crm.deploymentconfigtool addresssettings update -webapprootdomain:crmdevapp:80

    microsoft.crm.deploymentconfigtool addresssettings update -sdkrootdomain: crmdevapp:80

    microsoft.crm.deploymentconfigtool ifdsettings update -sdkrootdomain: crmdevapp:80

    microsoft.crm.deploymentconfigtool ifdsettings update -webapprootdomain: crmdevapp:80