When you try to connect a Microsoft inbox in your settings, Microsoft might ask you to first have an Administrator approve it.
In that case, please copy the admin approval link by clicking on the double squares icon:
Then send it to your Microsoft admin and ask them to consent the access on behalf of the organization.
NEXT STEPS
Once you are ready with your accounts receivable email account, go back to the settings and, instead of copying the admin approval link, please click on "Sign in with Microsoft" and log in with your accounts receivable inbox. Do not use your personal one.
We highly recommend to open Kolleno in private mode, to ensure that Microsoft doesn't automatically try to connect your personal email account.