No, the Dante card can follow the H9000, or the H9000 can follow the Dante card.

When you check “Enable Sync to External” that is telling the Dante card to follow the H9000. You must make sure the H9000’s clock is set to internal, or following another clock source that is not Dante.

If you uncheck “Enable Sync to External” that is determining that the Dante card will be the clock source. You must then set the H9000’s clock source to Dante.