We have an instance of SQL Notifcation Services for which we have written a custom delivery channel. We had this process up and running in our QA environment running Windows Server 2003 with SQL Server 2005. It took a little bit of tweaking to the get the custom DLL trusted however we got it all working.
We have since deployed this code to our Live environment. This runs Windows Server 2008 with an Instance of SQL 2005 for Notification Services but then we have an instance of SQL 2008 which hosts the actual DB instance for Notification Services. Notification Services works as it should however we cannot get the custom DLL to be trusted as a result the custom delivery channel won’t work. We simply get the error
That assembly does not allow partially trusted callers
We have tried using the .NET configuration utility and caspol.exe to give the .dll full trust with no luck at all. The .dll is compiled as a .NET 2 dll as notification service requires this.
We are pretty much out of ideas at the moment and hoping someone can suggest something?
We have managed to fix our issue. It would appear that Windows Server 2008 is stricter in its implementation of code access. By giving granting access to the .DLL by it’s strong name rather than it’s path allowed Notification Services to access the code.
Notification Services was not at fault.