Modifying the properties of a user account generates an 'Unable to set proxies' error. (NETIQKB45841)

fact
Directory and Resource Administrator 7.5

symptom
Modifying the properties of a user account generates an 'Unable to set proxies' error.

symptom
Error: 'Unable to set proxies. The Proxy 'SMTP:' is already assigned to object: 'OnePoint://CN=OnePointPathName.'

cause
The user account referenced in the error message has a blank SMTP address.

fix
Remove the blank SMTP address from the user account referenced in the error message.

Formerly known as NETIQKB45841