Overview:
Error is thrown when trying to Edit/Add an Account via DCR:
Could not get DCR Requirement from CRM Server
Root Cause:
The error can occur if the User does not have a Country set.
Solution:
The Country on the Address field, as well as the two-letter ISO code in the Country_Code_vod__c should be populated for the User record. The Country is required for DCR to determine for example the DCR Field types, or if Network is used, the field mappings.