Skype For Business: How To Update/Change A VM Message
Notes: Follow these steps when trying to find out how to update/change VM on Skype Desktop Client.
o settings > status > platform > application > main > version.
o press and hold 1 button, and call VM on dial pad, then leave the wanted/desired greeting.
If you have O365 you can use the VM Tab in the skype client.
Example: