TIM did not give reasons for Cadoret's exit, but, through Chairman Salvatore Rossi, thanked him "for his contribution to the company over the years."

Vivendi has clashed with Rossi, a former Bank of Italy official, over corporate governance issues on a number of occasions.

Vivendi declined to comment.

The other Vivendi representative on TIM's board is the French media conglomerate's chief executive, Arnaud de Puyfontaine.

Earlier on Wednesday, two people familiar with the matter said TIM could call a board meeting on Nov. 30 to find a replacement for former board member Luca de Meo, who left in September.

(Reporting by Alvise Armellini and Elvira Pollina, editing by Gianluca Semeraro and Tomasz Janowski)