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Note: Before Starting the Process to do so, Make a backup of IMAP Account Mailboxes as well Outlook Folder 1. Solutions to Overcome Error 0x800CCC0E or Outlook Cannot Synchronize Subscribed Folders Now, Let’s begin with solutions to overcome the issue of Outlook cannot synchronize subscribed folders or Error 0x800CCC0E.
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When users receive, Outlook unable to synchronize subscribed folders means, Outlook is not set up to verify that the server needs an advanced IMAP configuration parameter to read from the folder structure accurately. After configuration of an IMAP account, Outlook starts downloading all the messages with all its attachments. This error appears when users connect or configure an IMAP email account to Outlook. Solutions to Overcome Error 0x800CCC0E or Outlook Cannot Synchronize Subscribed Folders.This also helps them keep compliant with GDPR guidelines on email archiving. To avoid this problem happening again in the future, we also configured Outlook’s “autoarchive” feature in their systems to keep their “inbox” and “sent item” folders nice and slim without being bogged down with old emails. This solution was applied to every system in their office and now their Outlook is performing optimally again. In the next dialogue box, only select “inbox” and “sent” items folders.Under Received Mail Items – tick the option for “use the custom behavior defined below”.Untick box with “Get folder unread count for subscribed folders”.Now click on Define Send/Receive groups followed by Edit.Click on Send/Receive Groups dropdown arrow.Go to the Send/Receive tab in Outlook 2016.After 1.5 hours of troubleshooting, we found the issue. Some configuration issue was causing the sync process to be extremely slow. The blue progress bar would laboriously travel across the screen as their IMAP folders synced. We pressed “send and receive” a few more times and each time we could see the same sequence of events happening. Something else was at play here and we were determined to pinpoint it. In this case, we could safely rule out PST file (personal storage) corruption or Outlook user profile corruption because, while it was possible the store folders or the application itself was corrupt, it would be unlikely that all 5 users would have this problem simultaneously. As a whole, this is a fairly reliable application, but it does have its foibles (like corrupt store folders and other quirks). Our suspicions were now turning to Outlook 2016. Communication between client PCs and their IMAP server was stable with all ICMP requests being responded to quickly. The Blacknight domain, on which their website and emails were hosted, also showed no issues. Their Virgin Media broadband speed was good both downstream (62.1 Mbps) and upstream (4.1 Mbps). One user described the problem like rushing for an appointment only to have traffic lights continuously turn red along the route. In a busy architectural practice this problem was, quite understandably, beginning to irritate some users. This would pop up on their screens and stubbornly linger there for around 90 seconds (sometimes longer) until the IMAP sync had completed. So, instead of emails flying into their inbox and emails flying out of their outbox – users would get a message about “synchronizing subscribed folders”. However, all of these systems were exhibiting the exact same problem: namely Outlook 2016 would hang after pressing “send and receive”. These systems were using Outlook 2016 as their email application which synced with their Blacknight email server.
#Outlook 2016 imap sync issues windows 10
They had 5 Dell Optiplex computers in their office all running Windows 10 Pro. We recently helped a Dublin architectural firm resolve an issue with their slow email.