change default incremental sync range

Author: dgaley

digicert-certcentral-caplugin/CertCentralCAPlugin.cs

@@ -761,8 +761,8 @@ public async Task Synchronize(BlockingCollection<AnyCAPluginCertificate> blockin
 			_logger.MethodEntry(LogLevel.Trace);
 
 			// DigiCert issue with treating the timezone as mountain time. -7 hours to accomodate DST
-			// If no last sync, use 7 days in the past as the starting point (only relevant for incremental syncs)
-			lastSync = lastSync.HasValue ? lastSync.Value.AddHours(-7) : DateTime.UtcNow.AddDays(-7); 
+			// If no last sync, use a 6 day window for the sync range (only relevant for incremental syncs)
+			lastSync = lastSync.HasValue ? lastSync.Value.AddHours(-7) : DateTime.UtcNow.AddDays(-5); 
 			DateTime? utcDate = DateTime.UtcNow.AddDays(1);
 			string lastSyncFormat = FormatSyncDate(lastSync);
 			string todaySyncFormat = FormatSyncDate(utcDate);