Upload custom Exchange Unified Messaging (UM) voice mailbox

It is possible to upload a custom voice mailbox sound file per user with skype for business 2015 and Microsoft Exchange 2016:

Here a little how to:

• Convert your audio file to the following format using http://audio.online-convert.com/convert-to-wav

Format needed:
Audio bitrate: 16 kbps
Audio frequency: 8000 Hz
Audio channels: mono
Normalize audio: yes

• Use an exchange user with impersonation rights (See Exchange application impersonation )
• You need the EWS API installed to use the script. 
• Put your wav audio file to C:\Scripts\Skype\Track\
• Use the following script from Ben Lye to upload your wav file and enter the user name and path to the wav file:

Script Download See Onesimplescript from Ben Lye - THANKS.

• After the upload you should get a summary, make sure that you can see the correct "SampleRateHz", otherwise you did not convert the audio track correctly.