HTTP 401 Unauthorized error while inserting/updating through CRM web service

If you are experiencing 401 error - "The request failed with HTTP status 401: Unauthorized" while inserting/updating a record in CRM database through CRM web service .create or .update method even when you can access the CRM web service/meta web service through browser (IE) then you may want to probably check your "manage network password" of your windows login account. Control Panel -> Users -> User name -> Manage network password and add the server IP (where CRM web service is hosted) with correct credentials if required or if you changed your network password then try updaing your password in here as well. Stop the current process run and try running/accessing the CRM web service insert/update and it should work fine. HTH, - Dipesh