Users can configure their mobile devices to request synchronization for all email and calendar items. However, you might not want to allow users to synchronize that much data.
By default, users are allowed to synchronize a maximum of 30 days of email and 180 days of calendar items. You can set the allowed maximums higher or lower as needed.
In the Mobility Admin console, click Config, then click Device to display the Device Sync Agent Configuration page.
In the Maximum Email Sync Limit field, adjust the maximum number of days for email.
The maximum setting is 730 days (2 years).
NOTE:This setting also applies to Sticky Notes.
In the Maximum Calendar Sync Limit field, adjust the maximum number of days for calendar items.
The maximum settings for these fields is 730 days (2 years).
If users try to configure their mobile devices to synchronize more days of data than you have allowed, they receive a warning message.
Click Save to save the new setting(s).
Restart the Mobility Service:
gms restart