Connecting iRestore to QuickBooks Online should only need to be done once and then will work for all users of iRestore. Here are the steps for installing:

1. First, Go to Settings from the Main Menu and then click on QuickBooks Connector:
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2. Click 'Begin Session (NEW)'. 

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3. You will be asked to Log In to your QuickBooks Online Account. Log In, and you will be taken to the iRestore homepage.

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4. Copy the URL you get after logging into Quickbooks and being redirected to iRestore.io, and paste it into the dialogue box that should pop up in iRestore itself. (Note: On occasion this box may be hidden behind your Web Browser, so if you do not see it, try minimizing all other windows.

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5. Hit OK, and you should now be connected with QuickBooks Online!