I'm having the same stinking issue. Only, I'm using QB2020 desktop for Mac. I was already on the phone yesterday with support. Support cannot figure it out either. I guess I'll have to contact Microsoft. It's got to be something on their end that is not letting QB get into the mail server settings.
@bpike wrote:
Thanks @MaryLandT
That did not work. I already had the account set-up. I get an error "Unable to authenticate with the current session's credentials." For some reason it can't connect.
