South African scrum-half Ruan Pienaar signs a three-year contract with French Top 14 side Montpellier after leaving Ulster.
South African prop Schalk van der Merwe's Ulster debut looks likely to be delayed as he requires shoulder surgery.
Ulster will play Wasps, La Rochelle and Harlequins in Pool One of next season's European Champions Cup.
Ulster appoint Grenoble forwards coach Aaron Dundon to Les Kiss' backroom team as he is named as scrum coach.
Audio & Video
British and Irish Lions head coach Warren Gatland praises Jared Payne and Rob Henshaw after selecting the Ireland pair in the team to face the Blues on Wednesday.
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