Normal users with OperatorRO privilege are not able to save their WebClient preferences. They receive the message: Error in saving preferences: PartialFailure
A user with OperatorRO privilege role does not have specific privileges to write the new attribute WebclientUserPreferences (0x13341) as a result you see the error:
Error in saving preferences: PartialFailure
Give to that user the 'Model Write-Model Notes' privilege (Privileges -> Model Management -> Model Write -> Model Notes) or the OperatorRW privilege role.
See also this Community Discussion: https://communities.ca.com/message/241862453?et=watches.email.thread#comment-241862453