After creating, the Voicemail Greeting, you can test it by calling to your number from another phone, and see if it is playing correctly or not. Open the Phone App. On the lower screen, tap on the Voicemail option. Select Custom, with this option, you can record the personal voicemail greeting on the iPhone. Tap Record, to start recording the voicemail greeting message on the iPhone. Greeting samples are given in this article below, Once you are done with recording, tap Play to listen. Lastly, if everything is alright, and custom voicemail recording is perfect, then tap Save.
You can change your voicemail settings from the Skype for Business Settings page. You can get to the page by using one of the following methods:

Before moving on to learning about voicemail message templates, let’s learn some tips to effectively take phone messages. Tips for Taking Phone Messages Effectively . Creating a phone message template is the first step in starting a good phone communication procedure – but …
Increase the odds of getting a call back by mentally composing your message before each call. And remember, people hate it when callers state their name and phone number too quickly in voice mail messages – no one wants to listen to a message ten times to comprehend simple information.