0x800CCC0E Error- Outlook

Sorry for the confusion and thanks for clarification.    I interpreted the top area of webmail as 'frequent' or 'popular' items and everything below being the full inbox, including subfolders.  

Well at least the definition of "subfolder" is cleared up!  And to hammer home the definition if mouse over one of your folders in the webmail, e.g., TestATT, and click the little downward pointing triangle on the right of the highlight, you see a drop-down menu of commands, one of which is "Create subfolder", i.e., a folder whose parent will be, in this case, TestATT.

There are 3 that don't match. Archive, Spam, and Bulk Mail.

You don't show Bulk Mail in your outlook folder list in the picture.  But FYI for "Bulk Mail" is the name outlook uses correspond to the server spam folder named "spam" in the webmail.  Not sure where the naming convention comes from (never bothered to google for it) but my Thunderbird does it too.  Given these naming conventions I don't know why you created your own folders called "spam" and "junk e-mail".

As for Archive, both the webmail and your outlook appear to have it so I guess you didn't notice.

Of course none of this is getting any closer to your actual problem.  But getting back to post 6 where I went off the "deep end",

Additional question- any thoughts on why, when I'm on 'Inbox' I get the error, but if I select a sub-folder, inside of my Inbox, I do not get an error and it works.  The changing of folder seems to resolve it, although temporarily.

It may be a corrupt email message in the inbox that is causing the problem.  In POP clients that usually ends up with the client just hanging but it could be a function of the client's error recover and who knows how it reacts with IMAP?

Here's a trouble shooting technique to test for a corrupt message in the inbox...

I assume you can open the inbox in the webmail.  If you were using POP I would suggest creating a new temporary folder and moving all the stuff out of the inbox into the temp folder and then seeing if the client hangs with the now empty inbox.  If it did then you know you had a corrupt message and you could move stuff back from the temp folder into the inbox a bit at a time to try to find the bad email message.  Or if you didn't care, read everything you can in the temp folder and just delete the temp folder so you now have a pristine empty (and "happy") inbox.

Since I never did this with IMAP I am about to "think out loud"...

I guess you could do the same thing with IMAP.  Again in the webmail move all the inbox contents to a newly crated temp folder.   If the is a bad message in there I would expect one of two things to happen.  When the new temp folder is created that would appear in your outlook as well (probably some delay to sync of course) but when you start moving the inbox contents it might fail and maybe what made into the temp fold might give a clue of the "bad" message (the last one that didn't make across into the temp folder or close to it). 

If all of them make it into the new temp folder then can you now reproduce the error by clicking on the temp folder in outlook?  And/or do you now not get an error clicking on the inbox?  If now no error clicking the inbox then I guess it is some message that's the culprit.  But if you still get the error it's back to square one.  Might as well move all the stuff from the temp folder back to the inbox and delete the temp folder to get back to what you originally had (and again if you really care about that stuff).

Post what happens when you try this experiment.

Thanks for the suggestion and time on this!  Sorry about the mess up on the folders...I, obviously, missed a few-  it got a little messy looking at all of that.  Here's what I tried:

1- on webmail, moved everything in a temp folder.

2- send/receive in Outlook failed, disconnected.  Used my usual 'fix' which is to select a inbox sub-folder and send/receive.  The send receive moved the inbox into the temp folder in outlook BUT the 'synchronizing subscribed folders...' step took a long time...well over 10 minutes. 

1. Went to different inbox in outlook to send test message. 
2. Came back to ATT Inbox in Outlook=  "Cannot display the folder.  cannot connect to the sever."  
3. Select different folder, it displays normally. 
4. Go back to inbox, it displays but shows 'Disconnected'. (at the bottom right of outlook,)  Send/receive, now works.   Inbox shows 'connected'. 
5. Watched the 'Connected' message at the bottom of Outlook to see if it would change on it's own.
6. After 5 minutes.  Sent message to ATT from other account, via phone.  It arrived in inbox w/o any intervention!  First time this has happened during this process!! but...
7. Hit send/receive to see what it would do and got 'Send/Receive Error' 0x800CCC0E'
8. Outlook shows 'Disonnected'
9. Sent message from different account via phone.   Message didn't arrive automatically. 
10. Hit Send/Receive, Outlook changed to Connected but still got 0x800CCC0E error

I'm wondering if it's due to the folder discrepancy between webmail and outlook.  

Here's a look/breakdown of the two inboxes again:

1. 1 Spam  in outlook and 2 in webmail.  These are two different folders on webmail.  One has content that's truly spam.  The other is empty, which matches outlook.

   Bulk mail in webmail but not outlook.  This is empty on webmail.

2. I really think it may be related to one of the two (or both of the items above spam/bulk)

3.  

   No Search Folders in webmail

    

4. Inbox listed in Outlook and 2 in webmail.  Outlook has inbox subfolders, this appears below and not in the main inbox of webmail.  **I believe both of these are the same in webmail.  If I select one, both are highlighted.:

5. Trash 1 in outlook and 2 in webmail.  **I believe both of these are the same in webmail.  If I select one, both are highlighted.:
6. 

I can't tell which is which in that picture: att email on left and outlook on right or vice versa.  I guess it's att email on the right but not sure why you message counts show is little blue circles while mine are in light grey.  Style doesn't control this and it' probably off topic.

Sorry I suggested the troublehooting technique because now it looks like you've messed up everything.

I think I mentioned before outlook's Bulk mail should correspond to webmail's Spam.   If the webmail is on the right I don't know why you have a Bulk Mail, and Inbox and Spam there unless you created them explicitly. 

This is getting too complicated and out of hand and I don't think diagnosing like this is going to work across a forum.  Someone needs to get hands on to salvage this.

ATT is on the right.  Not sure about colors, either.

I'm going to create a new account in outlook and start from scratch.  If that operates normally, I'll work on adding folders back and go from there.

I appreciate your time and thought on this!

Update- Created a new account for this in outlook, after clearing out every message from my inbox and all folders, sent/trash, etc.  The new account is doing the same thing.  

Possible solution!!!

I was setting up a second account to use as storage to clear every email from this account, in case it was a bad email.  While setting up the new account, I couldn't connect using the settings of my old account.

On the Outgoing Server tab in Outlook mail settings, I changed from 'log on using' to 'Use same settings as my incoming mail server'.

This allowed the new account to connect, so I tested it on the old account and everything appears to be working correctly now.