How to Resolve 500 Internal Server Errors Caused by Custom Parameters in Dynamics CRM

I’ve spent quite some time now banging my head off the desk to figure out what was causing an issue with one of our PowerObjects solutions after we’d attempted to migrate to CRM 2016 from CRM 2013 and have finally found the cause.

Quite a few solutions in the market use custom parameters on the end of address’s to pass data which if you look at a network trace in any browser will display similar to this –

https://dynamics-URL/OrgName/WebResources/powf_/EntityLookup.html?dType=1

However, after you’ve migrated you may find you start seeing the ever useful generic 500 error when attempting to do lookups of any kind which I’ll show you how to fix.

Continue reading “How to Resolve 500 Internal Server Errors Caused by Custom Parameters in Dynamics CRM”