1. On the phone Home screen, click Start > ActiveSync > Menu > Schedule.
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2. Do one or both of the following:
Under Peak times, select As items arrive. It's more cost-efficient to synchronize on at regular intervals when mail volume is high.
Under Off-peak times, select As items arrive. This can be more cost-efficient than synchronizing on a regular schedule when mail volume is low.
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3. When finished, click Menu > Device Address to provide Exchange Server with the address to use to contact your phone.
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4. Click Done.
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***It only applies for Windows Mobile Devices***