outlook 2016 on Mac - "Mailbox already exists" error.

I also have encountered the same issue with the frequent "Error "mailbox already exists (0.000 + 0.000 secs)" - and Outlook losing connection to the IMAP server (shows empty account).

Then, either through manual intervention (clicking on another account and then coming back), or sometimes it just does it by itself, it "rediscovers" my IMAP mailbox and works OK... Until next time (falls over every ?? 30 minutes or so).

Using outlook 2016 on Mac V15.34, MAC OS (10.12.5).

I had to bite the bullet and purchase an OLM to MBOX converter and am now happily using Mac Mail.

Very disappointed in Microsoft on their local of resolution to this.

I have used Outlook for decades, but this is intolerably. I concur, only solution is use Mac Mail, Microsoft doesn't have the time for this issue.

I've tried everything recommended short of reformatting my mac which I am not going to to. I've had it with outlook - on to Mac Mail.

I just got a phone call a few days ago from Microsoft and they told me that the only thing left to do is to format my mac and re install every thing. they also mentioned that "they are not Apple and they can't help". I bout this product from Microsoft as far as I remember.

What a great solution! NOT.

I told theme that this is to far and they can't even promise that this help so there is no chance.

Their answer was "We are sorry, this is the only solution and we never got any case like this before, you are the first one!" I told them to google up this issue and tell me again if I am the first.

The answer was " We where glade to help you and after you format your mac please let us know and we will give you 3 months subscription for free".. thanks, it is very helpful to get this "free" subscription when your getting a not working product...

I gave up.

I concur.  The archive has not worked for me either.  Mac Mail might be the solution for this comcast account.