The link above won't work for wireless. It appears its for landline. Make sure your wife asks whoever at your company is responsible for managing the company wireless phones first. Your wife most likely will not be authorized to make any changes to her line including resetting the VM password. Only a few people at any organization are authorized to make these changes, unless they have specific instructions noted on the account. It's probably better to ask Customer Care to reset the voice mail itself, not just the password, which will erase any old messages and greetings.