About twenty minutes, most of it waiting for a mailbox to exist. Here is everything, so you can have it ready rather than hunt for it half way through.
Meridian Freightmeridian-freightAmerica/New_Yorkmeridianfreight.comalex@meridianfreight.comops@meridianfreight.comjane@meridianfreight.comYou can use your own mailbox, or one we host. We recommend your own, and the reason is worth a sentence: if Jane lives at jane@yourcompany.com, your correspondence stays inside your own Google Workspace and we hold nothing but a token scoped to that one mailbox. If she lives on our domain instead, your mail with your customers passes through our systems, and you would be copying an outside address on customer threads — which your own compliance people will have a view about. We will host one if you would rather not create an account, but ask for it deliberately rather than by default.
Everything above is information. These are actions, and none of them can be done on your behalf — which is the point.
In your Google Workspace admin console, add a user for the address above. A standard licensed user — Jane needs to send mail, not just receive it.
Sign in as that mailbox and approve the permissions. This is the only step that gives us access to anything, it is scoped to that one mailbox, and you can revoke it from your Google account at any time.
Email the mailbox with a document attached, then ask her a question about it. If she answers, everything is connected.
Only the mail you copy her on. She has no access to your inbox, your drive or anything else in your Workspace — the permission you grant is for the one mailbox you create for her.
Within that, two rules that matter more than they sound. A message you copy her on but do not address to her is watched, not answered: she will remind you about the thread and will not reply to it, however much it reads like a question. And where several of your colleagues use her, they share a knowledge base of company documents and nothing else — your correspondence, your reminders and your customers’ files stay yours.
When you grant access, Google may show a screen saying the app is not verified. That is Google’s review process rather than a problem with the permissions, and we are going through it. Until it completes you can proceed via Advanced → Go to…, or wait for us to tell you it has cleared. We would rather say so here than have you meet it unexpectedly.