Using classic Outlook for Windows in business environments
Hi Dean,
Based on what you've described, Outlook Classic may not be synchronizing with your IMAP server properly.
In order to avoid the impact of sync delays on you as much as possible, please try the steps below:
- Select Send/Receive > Send/Receive Groups > Define Send/Receive Groups.
- Select All Accounts > Edit.
- Select one of your IMAP accounts from left-side-list, then check the "Include the selected account in this group" box.
- Make sure "Send mail items" and "Get folder unread count for subscribed folders" are selected.
- Select "Use the custom behavior defined below" under "Receive mail items" > right click the mailbox and choose "check all subfolders".
- Check the same settings for your another IMAP account and click OK.
- Then, check the second Schedule an automatic send/receive every n minutes option and modify the sync frequency time to 1 minute so that you won't miss the new emails for too long.
- Click Close and restart your Outlook
If that doesn’t help, there are two more things to try:
- Reset the send/receive settings file: Close Outlook, go to C:\Users%username%\AppData\Roaming\Microsoft\Outlook, rename Outlook.srs to Outlook.srs.old, then restart Outlook.
- Create a new Outlook profile. Please follow guidance in this article: Create a profile in classic Outlook for Windows | Microsoft Support
Regarding the folders that require "administrator access" to delete, that is unusual for a standard IMAP account.
You can try first unsubscribe the target folder from the IMAP account:
- Right-click the Inbox of the account that contains the folder you want to remove.
- Select IMAP Folders.
- Open the Subscribed tab.
- Click Query to display the list of subscribed folders, including the folder you want to delete.
- Select the folder or subfolder you wish to remove.
- Click Unsubscribe.
- Click OK.
After the folder has been unsubscribed, you should be able to delete it normally from Outlook. If the folder still cannot be removed, please show me a screenshot of the exact error message you receive so that I can help you with more accuracy
If you have any questions or need further assistance, please feel free to share them in the comments on this post.
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