Issues with CU6 for Exchange server 2013: An update
Update on some of the issue related to Exchange 2013 CU6: - Databases unexpectedly fail over in a co-existence environment with E2007 - Exchange Online mailboxes cannot be managed by using EAC after you deploy E2013 CU6 - You cannot route ActiveSync traffic to E2007 mailboxes after you upgrade to E2013 CU6
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Another Exchange 2013 CU6 issue: Exchange 2007 users cannot sync over Activesync

It seems CU6 is not bringing much luck if you still have Exchange 2007 in your environment. There is yet another issue with this update:

Log Name: Application
Source: MSExchange Common
Date: <edited out>
Event ID: 4999
Task Category: General
Level: Error
Keywords: Classic
User: N/A
Computer: <edited out>

Watson report about to be sent for process id: 16024, with parameters: E12, c-RTL-AMD64, 15.00.0995.029, w3wp#MSExchangeSyncAppPool, M.Exchange.AirSyncHandler, M.E.A.Handler.LegacyUserAllowedToSync, System.InvalidCastException, 9619, 15.00.0995.026.
ErrorReportingEnabled: True


For some reason the 2013 mailbox breaks the legacy users sync. Microsoft is aware and working on an interim update. Current workarounds are either forwarding all traffic directly to the Exchange 2007 CAS server or reverting back to a previous update

Update 9/9/2014: A fix is available from Microsoft:


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Updates to the exchange server calculators!

Some updates were made to the Exchange 2010 and 2013 server calculators!

2013 update list:
  • Optimized Volume Design Architecture Formula.
  • Fixed Recommended Min Number of GC Cores (Secondary Datacenter)" calculation to use SDC instead of PDC CAS count.
  • Fixed CPU comments and removed erroneous information.
  • Fixed multiple conditional formatting bugs.
  • Fixed problem where this workbook had to be the active workbook at all times.
  • Fixed problem with extra-wide Fail Server button on the distribution worksheet.
  • Enabled variable based tracing.
  • Resolved VBA Divide by Zero error caused by DiskGroup = 0.
  • Fixed problem with lagged copies in conjunction with multiple databases per volume.
  • Fixed missing "\" character in path names in MailboxDatabases.csv file.
  • Fixed problem with WAN failure simulation.
  • Fixed calcNumAMBXServersDC2 to ensure it cannot have more servers that primary site.
  • Fixed calculated IO Multiplication factor formulas to take into consideration IOPS override.
  • Added condition to validate that there are enough copies for multiple databases/volume scenario.
  • Fixed conditional formatting and JBOD storage results when JBOD evaluation is disabled.

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Lync 2013 September Update released!
We have a new update released for Lync 2013! The september update for Lync 2013 is available:
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