While the exact features offered in any particular UCaaS solution can change radically from vendor to vendor, most include options for video conferencing, shared meeting and online collaboration tools, integrated faxing, mobile VoIP integration, and device-independent softphone clients. That last one is especially important now because it means that your employees can download an app to their personal smartphone or company laptop and that app will mirror all the functionality of their corporate phone, including responding to calls coming into your business phone number and their extension in particular. For folks trapped at home by the pandemic, that's a perfect solution.
Grasshopper provides a rich array of features, including custom greetings, call forwarding, call screening, and inbound fax. Voice mail and inbound faxes are automatically converted to email, so there are no documents to convert. Grasshopper will even read your voicemail to you. With Instant Response (included as part of the package), if you miss a call, a pre-determined text message will be sent to the caller.

At one time voicemail was a disruptive and innovative new technology. Who can forget their first answering machine in the '80s? We used to have some fun with those recording greetings!
It’s a good practice for each of your team members to have their own personal business phone numbers. There are many reasons why they shouldn’t use their personal cell phone number for business, so you’ll want to give them their own phone number through your VoIP provider or phone system.