I keep on getting this notice - what should I do ?
________________________________________________

ahoo address book synchronization has been temporarily blocked for this account. Zimbra Desktop will automatically try to synchronize again in about 15 minutes.

Debug message: Yahoo address book synchronization failed

Exception:

com.zimbra.cs.offline.ab.yab.YabImport$1: Yahoo address book synchronization failed
ExceptionId:sync-mbox-avi.marks@yahoo.com:1304618325906:ba1d6411be474781
Code:yab.999
at com.zimbra.cs.offline.ab.yab.YabImport.serviceExce ption(YabImport.java:97)
at com.zimbra.cs.offline.ab.yab.YabImport.failed(YabI mport.java:82)
at com.zimbra.cs.offline.ab.yab.YabImport.importData( YabImport.java:70)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:94)
at com.zimbra.cs.offline.YMailImport.importData(YMail Import.java:59)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:312)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:276)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncAllLoc alDataSources(DataSourceMailbox.java:441)
at com.zimbra.cs.mailbox.DataSourceMailbox.sync(DataS ourceMailbox.java:471)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncOnTime r(DataSourceMailbox.java:408)
at com.zimbra.cs.mailbox.SyncMailbox$1.run(SyncMailbo x.java:278)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)

If issue persists please post description and debug information here.