RC CANT RESOLVE USER

[ca support]

Dear Team,

Could you Please help on below error,

RC CANT Resolve the user,when i try to add Active directory user to provide remote control permission i am getting this error.

Thanks,
[e-mail]
9514405030.

[ca support]

Note:

local user can able to take the remote,
i have added AD user to root address/global address book
I have provided all privilege to the user but its not working