Voicemail Light - How to clear voicemails?

[lux eye]

Hello,

We recently just purchased a YeaLink T46G phone and loving it so far. On this phone it has a light on the top right corner blinking to let us know we have a voicemail. Our voicemail is set up through our provider and not through the phone. We have established 2 lines now and each line has a single voicemail waiting for us. I am assuming these are welcome voicemails since we have established new lines. When we go to check it, it wants us to set up a number to call to check these voicemails. In our situation, there is no number. How do I clear this manually so we can stop seeing this blinking light?

Thank you for any help you can provide.