Use this preference to set a server connection schedule. IMAP IDLE eliminates the need for you to run the Send & Receive command for the account. If this preference is available for your email service and you select it, Outlook automatically updates your IMAP folders continuously. Use IMAP IDLE (if the server supports it) Use this preference to set a sync schedule for all IMAP folders. However, when you are offline, you cannot read the message bodies or attachments.Įnable this option to download message headers only for folders other than the Inbox. Therefore, large messages (and any attachments) are downloaded only if you select them in the message list. With this preference turned on, only message headers are automatically downloaded to your computer. To access these settings, click Outlook > Preferences > Accounts, select the IMAP account, and then click Advanced.įor information about the primary IMAP account settings, see Basic IMAP account settings for Outlook for Mac.

Settings include options for downloading message headers and when to sync and update folders. The following table provides information and tips for entering advanced IMAP settings. Outlook for Microsoft 365 for Mac Outlook 2021 for Mac Office 2021 for Mac Outlook 2019 for Mac Office 2019 for Mac Outlook 2016 for Mac Office 2016 for Mac Office for business Office 365 Small Business More.

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