Completely Stop Outlook from Synchronizing Email Accounts

Unfortunately the new profile did not eliminate the freezing of synchronising.

The progress has been like this for quite some time this morning:

So, once again, the problem is Microsoft Outlook running an unnecessary 'sync' and the end-user not being able to disable this. If outlook gets closed while this sync is in a never-ending progress, then Outlook can't be restarted without going into task manager, finding and ending the Microsoft Office task and then restarting Outlook.

I know Microsoft have built some donkeys over the decades but surely this is the worst business grade product MS ever made!

Running Outlook in 'Safe Mode' makes little difference as it still runs the 'synchronising' for both email accounts whenever it does a send/receive. The only difference I notice is that it synchronises much quicker.

By default Outlook polls for mail (syncs) every 30 minutes, if its syncing every minute either there is a com add-in problem or someone has modified the polling interval

Not sure who would have done that but I'd love to know how to change it back to the default setting.

It's no better!

I have done EVERYTHING that anyone has suggested and still the freezing is occurring while 'Checking for new mail in subscribed folders' (synchronizing).

After a while of seeming to run smoothly, Outlook was synchronising for ages in Safe mode and I cancelled the progress. Then I closed Outlook and it would not reopen until I went into Task Manager and ended the Microsoft Outlook task that was still running.

That was from Safe Mode!

Back into Outlook in the normal way and were' back as we were.

New profile but still the 'Checking for new mail in subscribed folders' (synchronising) is painfully slow and we are constantly waiting for the next time it freezes while synchronising and then we have to close it, go into task manager, end task, reopen outlook...

Not the sort of workflow one expects for a premium product!

By default Outlook polls for mail (syncs) every 30 minutes, if its syncing every minute either there is a com add-in problem or someone has modified the polling interval

I'd love to tell you the exact version number but, as seems typical these days, I can't find it because it's not where Microsoft products have had the 'about' for 20 years and I have no idea where to find the version number. All I can tell you is that I am pretty sure it is the latest version.

Ah, I finally found it under 'Account' (who puts the product version number in Account?)

Version 1905 Build 11629.20246 Click-to-run.

I ran the Repair Office tool and it did whatever it did and then I launched Outlook again for a while to see if I could detect any changes and it is still synchronizing the 2 IMAP accounts. Whether it is doing it as often or as slowly is yet to be seen.

Synchronising appears FOUR TIMES in the Progress window when there's only 2 accounts. Perhaps that is because 'All Accounts' and 'All Email Accounts' are both active for sending & receiving?

The send/receive group settings is set for 'All Accounts' and 'All Email Accounts' to 5 minutes. Not sure why Outlook has 2 sets of send/receive rules but so be it... I have unscheduled the 'All Accounts' entry so the only send/receive entry that is active (every 5 minutes) is the 'All Email Accounts' entry.

To me, that means that Outlook should not be doing anything for 5 minutes in between checking for new emails but, within a minute (ish) I just saw 'Synchronizing Inbox' appear in the status bar - although it was brief. It seems Outlook is still Synchronizing Inbox every minute (ish).

I'd love to know what it is synchronising when nothing has changed.

Whilst typing this I am monitoring the status bar and all activity and occasionally double click on the send/rec notification so observe progress and see that synchronising always takes much longer than the sending and sometimes a minute or so even though there's no changes to synchronise.

This is the status so far. Although I've created a new profile I have not activated it yet because I did the repair and modified the send/receive groups first and will monitor this today. I have also not ran Outlook in safe mode yet and as far as I am aware there are no add-ins running.

The only Add-in I see mentioned when I view 'Manage COM Add-ins' is a TeamViewer meeting add in that we never use and have no need for. In 'Options > Add-ins' there are no active add-ins.

Outlook appears to be running better and the steps suggested have prompted me to look at various settings more closely and may have helped matters.

Thank you.