使用Office 365 / ADFS SingleSignOn时，使用用户名和密码从C＃连接到CRM Online

Question

We have CRM Online/Office 365 environment synced with an On-premise AD to enable single sign on from the desktop. However, since enabling this we are unable to connect to CRM Online from C# using a username and password - using the domain username and password results in "clientCredentials.UserName.UserName or clientCredentials.Windows.ClientCredential.UserName MUST be populated!"

Any thoughts ?

Answer 1

Documenting my findings for anyone else that experiences this problem.

I had the same error, and it was caused by the connection string to the CRM online instance having a user name, a password and domain.

When I removed the domain from my connection string, and added to the user name, the problem went away.

This question has some good answers on the correct connection strings to use: Connection to CRM