Each voicemail box has a time zone setting. The time zone in the Stratagy mailbox setting may be different then the time zone Windows server.
The Netmeeting is a bit of a challenge. When I had a Vista laptop I was able to get Netmeeting downloaded and installed on the laptop.I don't remember all the details. I tried to get it installed again on Windows 7 but I could not find a downloadable version that worked. Netmeeting refused to install on Windows 7.
With Windows 7 Pro, you can download and install XP mode from Microsoft, which is basically an XP virtual machine.
When I moved to Windows 10 I used VM player, which is a free from VMWare. The Windows XP virtual machine did require a Windows CD and a valid licenses key.