Office365: POP and IMAP clients receive OWA links for calendar invitations

As you may know, Office 365 supports a number of different client protocols, including POP and IMAP and a variety of POP and IMAP clients. By default, POP or IMAP clients will be configured to use Outlook Web App (OWA) for handling calendar invitations. When these clients receive a meeting request, within the body of…

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Verifying the file share witness server / directory in use for Exchange 2010

If you’ve read my blog post on file share witness oddities you might be asking yourself “how can I actually verify what file share witness is in use in my environment?”    There are three different ways to verify the witness in use for Exchange 2010.   1)  Exchange Management Shell   The Get-databaseavailabilitygroup –status…

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Exchange 2010: Implementing a dedicated backup network for a Database Availability Group…

Occasionally, customers that deploy highly available Mailbox servers use a dedicated or secondary network for backup operations. The way in which you do this in Exchange 2010 has changes, and it’s important that when you implement such a configuration that you don’t use the methods or instructions designed for previous versions of Exchange.   In…

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Exchange 2010: Move-DatabasePath results in an InvalidOperationException when mount points are utilized for storage.

In Exchange 2010 administrators may attempt to move either log files or database files using the command move-DatabasePath.  In some instances the command may fail containing an InvalidOperationException.  Here are some examples of the errors (note that verbose output is utilized): ======================================================== Move-DatabasePath –identity <name> –logFolderPath <path> –verbose [PS] C:\>Move-DatabasePath MBX-1-DB0 -LogFolderPath T:\NewPath -Verbose VERBOSE:…

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Exchange 2010: The mystery of the 9223372036854775766 copy queue…

Database Copy Self-Protection Mode   What would you say if I told you that a copy queue length (CQL) of 9 quintillion log files was not a bad thing? By the way, if you are wondering, that works out to a CQL of 9,223,372,036,854,775,766, a number so big that it cannot be entered into Windows…

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Exchange 2010 SP1: StartDagServerMaintenance.ps1 fails on databases that have only two database copies.

In Exchange 2010 Service Pack 1 we introduced some new DAG management scripts. These scripts can be found in the Exchange Server installation directory \ scripts. (This is usually c:\Program Files\Microsoft\Exchange Server\v14\scripts).   One of the scripts introduced is the StartDagServerMaintenance.ps1 script. More information on this script can be found at: http://technet.microsoft.com/en-us/library/ff625233.aspx http://technet.microsoft.com/en-us/library/dd298065.aspx   When…

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Exchange 2010 / 2013 – PAM and the Cluster Core Resources

At any given time, in every database availability group (DAG), there is one member that is responsible for the coordination of database actions across the DAG. This member is known as the Primary Active Manager (PAM). The current PAM can be determined by using Get-DatabaseAvailabilityGroup –Status, as shown below.   [PS] C:\>Get-DatabaseAvailabilityGroup -Status -Identity DAG…

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Exchange 2010 SP1: Error when adding or removing a mailbox database copy

If an Exchange 2010 RTM server <or> an Exchange 2010 SP1 Beta has been upgraded to Exchange 2010 SP1 RTM administrators may experience an error when attempting to utilize the remove-mailboxdatabasecopy <or> add-mailboxdatabasecopy commandlets. When running remove-mailboxdatabasecopy the following error is noted: Remove-MailboxDatabaseCopy DAG-DB0\DAG-2 –Verbose WARNING: An unexpected error has occurred and a Watson dump…

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Exchange 2010: HomeMTA and msExchHomeServerName are not updated on mailboxes.

In Exchange 2003 and Exchange 2007 when clients would attempt to connect to a mailbox it would be based on the server where that mailbox was homed.   Specifically these attributes would contain information about the server where a particular mailbox was homed:   HomeMTA msExchHomeServerName   In Exchange 2010 a mailbox object is no longer…

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Part 1: My databases do not automatically mount after I enabled Datacenter Activation Coordination

Datacenter Activation Coordination (DAC) mode is a property of a Database Availability Group (DAG) that, when enabled, forces starting DAG members to acquire permission in order to mount databases. Administrators can enable DAC mode at any time after the DAG has been created. DAC was designed specifically to handle the following scenario:   You have…

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