Thank you for bouncing in on my query! I am using IMAP in several email addresses, one POP and several Microsoft Exchange accounts.
Outlook works perfectly flawless 99.99% of the time. Once in a bit, I'll see when checking mail, it hangs and when I check it, is says 'syncing folders' and I've left it for over an hour one time but it did nothing but hang.
I have roughly 6 email addresses.
I have one Service Provider.
Accounts are small, in fact, several of them I rarely use.
Internet download speed is a massive 1.7 mbps and upload is a tremendous 0.6

I found the last time this problem arose, I shut down Outlook and upon opening it again, everything worked 100%.
Should I keep a Class C Fire Extinguisher close at hand?