Avaya once filed for bankruptcy. Now it's making a comeback by investing in cloud and partnering with Google and Microsoft. (AVYA)

· The $1.24 billion communications technology company Avaya filed for bankruptcy in 2017.
· Now it's planning for a comeback — and its strategy hinges on updating its entire business to serve not only customers using private data centers, but also the cloud.
· It underscores how even tech companies need to take stock of...