CRM 2015 – Web Service Error Codes

Below is a link to the Microsoft page with all the error codes and descriptions that can be thrown by CRM web services. 

https://msdn.microsoft.com/en-us/library/gg328182.aspx

Few examples below:

<crmerror> <ErrorId>80048531</ErrorId> <ManagedErrorName>CustomImageAttributeOnlyAllowedOnCustomEntity</ManagedErrorName> <ErrorMessage>A custom image attribute can only be added to a custom entity.</ErrorMessage> </crmerror> <crmerror> <ErrorId>80048530</ErrorId><ManagedErrorName>SqlEncryptionSymmetricKeyCannotOpenBecauseWrongPassword</ManagedErrorName> <ErrorMessage>Cannot open encryption Symmetric Key because the password is wrong.</ErrorMessage> </crmerror>