You will be asked to delete your current Voicemail greeting. Click on the ‘Yes’ button that appears on the screen if you want to remove that. You can save your new recorded Voicemail greeting or can use the default recorded option. Wait and hear the new Voicemail greeting message that the instructions speak out. If you want to keep that recording as your Voicemail greeting, then save it. Or you can re-record the message to get a different greeting.
Voicemail password and greeting. If you haven’t yet set up the Voicemail on your iPhone, the process is easy and onscreen prompts walk you through it. Open the Phone app and select Voicemail > Set Up Now. Create a password and a greeting. If you would like to change your Voicemail password or greeting down the road, these are both simple to

With voicemail all set up, you can now access and listen to your messages. In the Phone app next to the Voicemail tab, you’ll see a badge with a number, which represents the unheard messages you have. To listen to your messages, open Phone app and tap Voicemail at the lower right side of the screen.
By default beginning April 2017, voicemail transcription is available for all Phone System in Microsoft 365 users. When you receive a voicemail, the message will be transcribed in the body of the voicemail email you receive in your mailbox. If you do not want to have transcription for your messages, ask your admin to disable it for you.