Preview Text-to-speech customised greeting (voicemail) option
Please could you add a preview button for text-to-speech voicemail options. You could then type in the custom / out-of-office greetings and quickly play it to heard how it sounds. This would make it much quicker to phonetically change names and so on so that they sound better without having to phone yourself, wait for voicemail, ...
until they add the preview feature to Teams, I've found the following useful for testing
If you're an admin, you could at least make it a little less annoying to test by using an auto attendant greeting (so that it plays immediately when you call), then just copy and paste to your voicemail. A button would be nice though.