Send/Receive groups specify when and which mail items are sent and received. They also control updates to subscribed RSS Feeds and Internet Calendar subscriptions.
When you work offline, you might want to specify different settings. For example, you might want Outlook to connect to send and receive items only one time an hour. You can also specify whether to include or exclude a Send/Receive group when F9 (Send/Receive All) is pressed and you are working offline.
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Click Send / Receive.
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In the Send & Receive group, click Send/Receive Groups.
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Click Define Send/Receive Groups.
Keyboard shortcut To open the Send/Receive Groups dialog box, press Ctrl+Alt+S.
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Select the send/receive group that you want to change.
Note: If you haven’t created custom Send/Receive groups, select the All Accounts group.
Change the frequency of offline updates
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Under When Outlook is Offline, select the Schedule an automatic send/receive every... check box.
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Enter a number between 1 and 1440. If you want the send/receive to happen once a day, type 1440. (There are 1440 minutes in a day.)
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Select or clear the Include this group in send/receive F9 check box.
Change whether a Send/Receive group is included when F9 is pressed and you are working offline
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Select or clear the Include this group in send/receive F9 check box.