Try to set up my boss on qb as additional user, but he cannot open the invite link. msg: the feature you've requested is temporarily unavailable. tried 2 diff emails&same

Had a similar issue a week ago and we had to delete the user, recreate him and send a new invite on each occasion.  It worked on our last attempt!  Technology misbehaves sometimes!

Welcome to the QuickBooks Community, finance-bandalab. I'll share details on how user invitation works in QuickBooks. Let's also perform steps so your boss can access the link and accept it without issue.

When you add a user in QuickBooks, the invites expire after 48 hours. The added person must access the invite link within the specified time frame. That could be the reason your boss receives an error message stating that the feature you requested is temporarily unavailable.

Instead of resending the invitation, I recommend deleting the user and adding them again, as GeorgeKen1956 did. Then, a new invitation will be sent to your boss.

If the issue persists, I recommend advising your boss to access the invitation link on a private browser. Then, accept it from there. This is to rule out the possibility of a webpage issue that might cause you to keep getting an unexpected error.

Use these keyboard shortcuts based on the browser you're using:

• For Firefox or Microsoft Edge, press Ctrl + Shift + P.
• For Chrome, press Ctrl + Shift + N.
• For Safari, hold down Command + Shift + N.

If it works in incognito, your boos need to clear the cache of the regular browser. This removes the history or log of sites so you can start with a clean slate. If the steps above don't work, use another supported browser as an alternative.

Lastly, you can open this article if you need more details about user roles and how to manage them: User roles and access rights in QuickBooks Online.

Feel free to click the comment section below if you have other concerns with regard to managing your users in QBO. I'll be sure to get back to you. Have a good one, finance-bandalab.

Thanks for the reply. I did deleted the user and reset him again with the new link sent to him before, he kept saying it still did not work. That's why I tried another new email address for him yesterday and today he told me it still not working on the link.  

Did you delete and create the same email address again on your case?

Thank you for the response, @finance-bandalab. 

Yes, we tried to delete the initial invitation and resend using the same email address. 

I advise getting in touch with our Customer Support department as you continued to have an error after attempting to add your boss as an additional user. They can assist you in identifying the problem you're having and resolve it.

You can do it by going to the Help icon at the top right of the account. Follow the steps below: 

1. Go to the Help icon to connect to a live support agent.
2. Click on the Contact Us button and provide some details about this concern.
3. Provide us with some information about your concern in the What can we help you with? box and click on Continue.
4. You'll now be provided options on how to connect to our Customer Support.

Check this article for more information about the different types of support we offer and their availability: QuickBooks Online Support.

Here's more information about adding a new user or role or permissions: Add and manage users in QuickBooks Online. 

In case you'd like to give your boss access to every part of this QuickBooks account, here's how to change the primary admin user in QuickBooks Online.

Let me know if you need further help inviting users to access the QuickBooks account. Keep safe, and have a great rest of the day!

We had the same thing happen with a new user.  We tried:
1 - Checked Javascript and Cookies OK and did not fix
2 - Cleared Cached OK and did not fix
3 - Tried Incognito - OK and did not fix
4 - Deleted user and re-created, click on new invite OK and did not fix
5 - Used another computer and was able to accept invite and now login works on the first computer.