After applying the Update Roll-up 17 in Microsoft Dynamics CRM 2011, you may run into an error when opening the Deployment Manager. This is what the prompt with the deployment manager error after UR 17 looks like:
Type is not resolved for member ‘Microsoft.Crm.CrmSecurityException, Microsoft.Crm.Core
This is a known issue with UR 17 that can appear if the FQDN of your Domain Controller is more than 15 Characters (i.e. domaincontroller.contoso.com).
Luckily, there is a Hotfix! It isn’t publicly available, but you can get it by opening a ticket with Microsoft Technical Support. Or if you are a PowerObjects customer, open a ticket through our PowerCare Portal and we’ll be more than happy to work with Microsoft on your behalf to resolve the issue.