# OAuth Authentication Failed ## Error message: OAuth Authentication Failed Users may encounter this error when trying to register a Salesforce environment in ARM. This occurs when users do not use the My Domain URL when adding the Salesforce org to ARM. To correct this error, use **My Domain URL** while registering a Salesforce org in ARM. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://knowledgebase.autorabit.com/product-guides/arm/troubleshoot/arm-faqs/common-errors-and-resolutions/oauth-authentication-failed.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.