Renaming of users not working well in my organization (Renamed users don't msg)

Hello all,

When users are renamed, they do not recieve any message requesting them to accept the new name so that the rename process can get to completion. As a result of this, the new name gets reverted to the old one after a certain number of days.

Please how can I get the renamed users to get get the message requesting them to accept the new name.

Thanks for anticipated assistance.

Austine.