Error: The Exchange ActiveSync mailbox log couldn't be processed

When you try to retrieves the statistics for the mobile phone configured for user sometimes you may see the below error message

The Exchange ActiveSync mailbox log couldn't be processed: Logs couldn't be retrieved for your mobile device. Make sure your mobile device is synchronizing with Exchange before you start logging again and try to retrieve the logs. If the problem continues, contact your helpdesk.

    + CategoryInfo          : NotSpecified: (Rajis:....mail.COM:ExchangePrincipal) [Get-ActiveSyncDeviceStatistics], MobileDeviceLogException

    + FullyQualifiedErrorId : [Server=MBX02,RequestId=80364585-411f-4b6e-b3ba-24ceb80dd46b,TimeStamp=3/25/2014 10:   50:37 AM] D6F4C12F,Microsoft.Exchange.Management.Tasks.GetActiveSyncDeviceStatistics

 Solution

·         Enable ActiveSync Debugging log using CASMailbox cmdlet

o    Set-CASMailbox -identity Rajis -ActiveSyncDebugLogging:$true.

·         Collect users logs redirecting the logs to the specific email address

o    Get-ActiveSyncDeviceStatistics -Mailbox Rajis -GetMailboxLog:$true -NotificationEmailAddress:admin@mail.com