Have been deploying an upgrade to an application, had a few issues with SQL report performance (Which our DBA kindly fixed) – Not the overall issue.
Testing the application, everything was working till the absolute last step, then the 500 error hits. With a generic as hell message.
– Open the web.config file for the IIS site.
Add: <customErrors mode=”Off”/> (Or set it to Off it it already exists..)
– Open ‘Error Pages’ in IIS
– ‘Edit Feature Settings’
– ‘Detailed Errors’ (Then OK)
– Recycle the app
– Refresh the page.
BETTER ERROR MESSAGES.
NB: Our issue was that there was a connection to Exchange… Our test Exchange VM was turned off…