No, with the change to Zoom Phone, you will no longer need to dial 9 or 1 before the off-campus number you wish to call.
This applies to all Zoom phone uses including physical phones, softphone apps, and fax machines.
Fax Line Note: If you did not have to dial 9 or 1 prior to March 13, 2024, the vendor may have hard-coded those digits into the settings and it won't work on Zoom. Please contact the vendor to get this problem fixed. OneIT can not make these changes to the fax machine.