Do these two equally sound fine?
(1)What time will it be convenient for you, if I have her call you back?
(2)What time would it be convenient for you, if I have her call you back?
"Will" is direct and to-the-point. "Would" is polite and deferential.
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"Will" is direct and to-the-point.
"Would" is polite and deferential.