Synchronizing subscribed folders causes hanging during send/receive process

Not open for further replies.


Senior Member
Outlook version
Outlook 2016 64 bit
Email Account
This is an account I inherited. It has a good 40 folders of which I use 5 or 6. They have items that cannot be deleted and I don't want to archive them. I have a personal outlook account and it has a good amount of folders and does not exhibit this behavior so it seems to be that outlook should be handle this other account.
It does not get a ton of traffic. The folder is about a 1.5Gb.

It takes forever to sync folders causing me to have to wait and sometimes miss emails because they arrive much later than expected.
I followed a post here saying to check/uncheck (can't remember) download headers but I don't see that as an option in Office 365.

I did this and it helped but its still way too slow.
  • Click Query
  • Select all your IMAP folders
  • Click Unsubscribe. Outlook may warn you some folders are ‘special’. Click OK if this warning appears
  • Click OK
  • Close and re-open Outlook.
  • Select your Inbox
  • From the menu click Folder > IMAP Folders
  • Click Query
  • Select all your IMAP folders
  • Click Subscribe
  • Uncheck When displaying heirachy in Outlook, show only subscribed folders.
  • Click OK

any thoughts?

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
The account you inherited is IMAP? Did you try unsubscribing from the folders you don't use?

Go to Send & Receive settings - Ctrl+Alt+S - the check every nn minutes should be set to at least 5 minutes, higher is better. Then click Edit, select the account.

Note, you can also access this dialog from File, Options, Advanced, Send/Receive button or the Send/Receive menu, Send/Receive Groups, Define Send/Receive Groups. I would try disabling the option for Get folder unread count for subscribed folders - and maybe Use the custom behavior defined below - with only the folders you use selected.



Senior Member
Outlook version
Outlook 2016 64 bit
Email Account

Yes.,..that is how I have it set up. Only the 2 main inboxes are subscribed too. I keep these clean by moving emails to subfolders so there are maybe 20 emails 20 in the 2 sub'd inbox folders.

Nevertheless Outlook is constantly syncing '5 seconds remaining'
Not open for further replies.
Similar threads
Thread starter Title Forum Replies Date
F Wishlist Outlook suddenly began synchronizing deleted items every time I delete a single email. Using Outlook 2
O Outlook 365 - Tasks are not synchronizing? Using Outlook 7
Diane Poremsky Synchronizing Outlook with a Smartphone Using Outlook 0
Diane Poremsky Synchronizing Outlook on Two Computers Using Outlook 0
P Outlook Keeps Synchronizing IMAP "Sent Mail" Folder Using Outlook 0
D Outlook 2013 stopped synchronizing with my IMAP account Using Outlook 0
J Synchronizing Contact "File As" Using Outlook 2
M Can you stop "Microsft Office Outlook is synchronizing folders"? Using Outlook 2
T Outlook Error synchronizing your folder hierarchy : 80041050. Send Not Receive Using accounts in Outlook 6
H while synchronizing error is coming Outlook VBA and Custom Forms 3
W Outlook contacts not synchronizing with iPAQ BCM (Business Contact Manager) 3
Witzker Outlook 2019 Macro to seach in all contact Folders for marked Email Adress Outlook VBA and Custom Forms 1
TomHuckstep Remove Send/Receive All Folders (IMAP/POP) button from Outlook 365 Ribbon Using Outlook 1
C Trying to move messages between imap accounts/folders Using Outlook 5
icacream Outlook 2021 Win 10 - Nothing goes in my Drafts or Sent items folders ! Using Outlook 1
kburrows Outlook Email Body Text Disappears/Overlaps, Folders Switch Around when You Hover, Excel Opens Randomly and Runs in the Background - Profile Corrupt? Using Outlook 0
P now on office 365 but getting error messages about missing Outlook 2013 cache folders Using Outlook 2
Christopher M Saving Data: Don't check certain folders Using Outlook 2
J Unable to delete folders in Outlook 2019 / Windows Using Outlook 0
D This folder up to date vs all folders up to date Using Outlook 1
e_a_g_l_e_p_i Adjusting font size in folders Using Outlook 1
Abraham Outlook 2013 Lost my folders when moving from PST to IMAP Using Outlook 11
J How to import many msg into different public folders in Outlook Outlook VBA and Custom Forms 7
I Outlook for Mac 2019 using on desktop and laptop IMAP on both need help with folders Using Outlook 1
O Cannot expand the folder. The set of folders cannot be opened. You do not have permission to log on. Using Outlook 1
F VBA to move email from Non Default folder to Sub folders as per details given in excel file Outlook VBA and Custom Forms 11
R Moved 6 months worth (approx 1500 emails) lost from moving from TPG inbox to Icloud inbox (folders) Using Outlook 3
C What folders are needed when reinstalling Outlook 2010 Using Outlook 0
P Color Code or highlight folders in Outlook 2016 Using Outlook 2
A Moving Public Folders to New Database Exchange Server Administration 3
Paul Hobbs Automatically accept "Empty Folders" prompt Outlook VBA and Custom Forms 6
R Problem moving file “Email folders.pst” to new PC Using Outlook 5
D How To Combine Share Task Folders in just one Folder Using Outlook 0
R How to Sync *all* Google Workspace Mail Folders with Outlook 2019 (MS365) Using Outlook 3
Witzker print-list-of-outlook-folders with sort posibility Outlook VBA and Custom Forms 7
vodkasoda Hiding empty Folders Outlook VBA and Custom Forms 0
C Not sync folders not found after MS Outlook 365 update Using Outlook 1
Fozzie Bear Shared Public Folders Access and Use Exchange Server Administration 0
O The Outlook API wrongfully shows an outlook folder to have zero sub-folders Outlook VBA and Custom Forms 1
O The Outlook API wrongfully shows an outlook folder to have zero sub-folders Outlook VBA and Custom Forms 2
C Outlook with Office365 - search across account, by date rate, in multiple folders - how? Using Outlook 2
D Custom Search Folders not refreshing/updating automatically Using Outlook 0
T Outlook 2016 remove envelope icon for certain folders Using Outlook 5
GregS Outlook 2016 Sent Mail absent from Sent Mail or Sent Items Folders Using Outlook 4
R List folders in a combo box + select folder + move emails from inbox to that folder + reply to that email Outlook VBA and Custom Forms 1
N Sent emails not reflected in all IMAP Folders Using Outlook 4
A Custom VBA to sort emails into folders Outlook VBA and Custom Forms 0
jChambler iCloud folders in Outlook are not the same as on iCloud Using Outlook 6
R The way expand/collapse folders is actually meant to work? Using Outlook 2
David Langer Outlook 2016 (365) How to restore the ability to Re-Map iCloud IMAP Folders Using Outlook 5

Similar threads