Validating the Dynamics CRM integration with Marketo result in the "Sync user is assigned to the Marketo solution" error.
Sync user is assigned to the Marketo solution (0x80040220) Principal user (Id=4efd6952-d750-eb11-a812-000d3ac9c58d, type=8, roleCount=3, privilegeCount=564, accessMode=1(Setup/Stub user with filtered privileges from associated roles. Consider changing user AccessMode to Full (without privilege filtering))), is missing prvReadmkt_marketoconfig privilege (Id=52aaa983-724e-460d-93e0-e9ea89bf885e) on OTC=10579 for entity 'mkt_marketoconfig'. context.Caller=4efd6952-d750-eb11-a812-000d3ac9c58d [HTTP/1.1 403 Forbidden]
Ensure that the Marketo Sync User was given the correct permission in Dynamics.
Navigate to Setting > Security > Users > click on "Marketo Sync User" > scroll down to Administration > Access Mode = Read-Write
Note: "Marketo Sync User" may have been given a different name in your respective Dynamics CRM.
Validating Sync Setup