Change Greeting Message in AA

@JFM_12 - Thanks for bringing this issue to our attention. 

Yes, you can update only the greeting message of a Microsoft Teams Auto Attendant using PowerShell, without modifying the menu options.

How to do it:

1. Use the Teams PowerShell module (MicrosoftTeams).
2. Retrieve the Auto Attendant object.
3. Update the GreetingPrompt property only.

Example PowerShell:

# Connect to Teams
Connect-MicrosoftTeams

# Get the Auto Attendant
$aa = Get-CsAutoAttendant -Identity "<AutoAttendantId>"

# Update the greeting message (Text-to-Speech example)
Set-CsAutoAttendant -Identity $aa.Identity -GreetingPrompt @{ "PromptType" = "TextToSpeech"; "TextToSpeechPrompt" = "Your new greeting message." }

• Replace <AutoAttendantId> with your Auto Attendant's GUID or name.
• This command only changes the greeting; menu options remain unchanged.
• If you use a recorded audio file, set PromptType to "AudioFile" and provide the file.