Record Your Thoughts in Teams Personal and Group Chats To record a voice memo, hold down the microphone icon (Figure 1) and speak. Release the hold to stop the recording and then send it as you would a normal message. Teams Feature Storage Location Voicemail Messages Stored in users’ Outlook mailbox Meeting Recordings (1:1 and Group) Stored in the OneDrive account of the user who started the recording in a folder named Recordings
Also, carriers have a limit to how long they'll let you record a voice mail. Test it with your phone and a friend before you trust this method.

Your voicemail greeting can make a positive or negative impression on people. By considering your target audience and tone, you should be able to keep it positive. Length: Don’t make people wait minutes to leave a message. Apologies: If people expect your to be available, apologize for missing their call. Set expectations: Let people know when they may receive a callback, but be realistic. Accuracy: If you change your voicemail for things like holidays, be sure to update it when needed. How do You Set Up a Business Voicemail?
The bottom line is that a business’s situation is likely to change often and rapidly, each of which need a unique and applicable voicemail greeting to cover the circumstances and timeline. For example, callers shouldn’t reach a business-as-usual voicemail, and therefore expect a return call within the business day, if the subject they’re calling is out on vacation for two weeks. Such a lack of communication is a recipe to lose that caller’s trust and tarnish the brand’s reputation.