Telephone is better and quicker, regular video links are essential at first...One disadvantage of working from home that a friend of mine is finding is this:
They changed jobs a few weeks before the lockdown and are working from home to the best of their ability.
But if they need to know about working practices rather than saying:
'How do I do this or where can I find that?' with someone giving an instant reply or showing them straight away the answer has to be obtained by e-mail with the delays that causes.
Only a little thing but something I hadn't thought of.