All corporate/office based roles at my employer have had mandatory WFH since Monday 23rd, but about 70% started the Monday prior. Without connecting to the VPN we are able to use to use Microsoft Teams (for video conferences and voice calls, document sharing), Outlook for email, Workplace (office verson of face book), edit documents in owrd/excel/powepoint etc, launch citrix sessions to remote connect to test labs etc. Also those with work provided laptop (so not contractors) can also use Jira and Cunfluence, access some file servers, HR app etc with an RSA code from their phones (again no vpn).
I only connect to the VPN when i need to use certain app soo far that has just been the e-business apps (to raise purchase order or receipt goods). Then once done I disocnnect and keep on qwith everything else.
Stats form our IT guys this moring said we have had up to 4000 concurrent users on the VPN, but given there are 8000+ employees it shows lots can get buy wityhout being on the VPN.
Office have been really good about checking in on people, starting groups to make up for lack of office chit chat, they realise mental health will be a struggle for many.