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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...
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A good read on VSS backups…
http://blogs.technet.com/b/exchange/archive/2012/06/04/everything-you-need-to-know-about-exchange-backups-part-1.aspx
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Another good read on vss backups…
http://blogs.technet.com/b/exchange/archive/2012/06/14/everything-you-need-to-know-about-exchange-backups-part-2.aspx TIMMCMIC
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Exchange 2010: Adding database copies to databases with a single copy results...
In recent weeks, I’ve worked with customers that have experienced database copies that go into a failed state immediately after adding a copy. In all cases the following circumstances were noted: The...
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Part 5: Datacenter Activation Coordination: How do I force automount consensus?
In order for any database availability group (DAG) that has Datacenter Activation Coordination (DAC) mode to be able to mount any databases, the DAG itself much reach automount consensus. In the...
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Part 3: Datacenter Activation Coordination and the Single Node Cluster
In part 2 of this series, I provided a high level overview of how the witness server for a database availability group (DAG) is used with Datacenter Activation Coordination (DAC) mode in the scenario...
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Part 4: Datacenter Activation Coordination and the Prevention of Split Brain
In Part 1 of this blog post series, I discussed the rules for mounting databases when Datacenter Activation Coordination (DAC) mode is enabled on a Database Availability Group (DAG). In this post, I...
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Part 6: Datacenter Activation Coordination – Who has a say?
I recently worked with a customer that had a three-member database availability group (DAG) that was extended to two sites in a site resilience configuration. During scheduled maintenance in the...
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Exchange 2010: StopDagServerMaintenance.ps1 resets server and database...
In Exchange 2010, when a database availability group (DAG) member needs service, it can be placed into maintenance mode. To do this, Exchange 2010 includes scripts for this process called...
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Exchange 2010 Database Availability Groups and Disk Sector Sizes
These days, some customers are deploying Exchange databases and log files on advanced format (4K) drives. Although these drives support a physical sector size of 4096, many vendors are emulating 512...
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Exchange 2010: Page Zeroing and VSS Based Backups
In Exchange Server 2010 Service Pack 1, page zeroing is enabled by default and there is no method to disable it. Page zeroing is a process that takes pages that exist in whitespace within the database...
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Part 7: Datacenter Activation Coordination: When to run...
When running Restore-DatabaseAvailabilityGroup as part of the datacenter switchover process, servers in the secondary datacenter are forced online from a quorum and cluster perspective, and servers in...
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Part 8: Datacenter Activation Coordination: Stop! In the Name of DAG…
Sometimes, even when following a specific process, it takes only one mistake to send the entire process off course. Recently I’ve worked with several customers on their datacenter switchover steps...
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Part 9: Datacenter Activation Coordination: An error caused a change in the...
As a part of a datacenter switchover process, administrators run Stop-DatabaseAvailabilityGroup to stop DAG members in the failed datacenter. This cmdlet is responsible for updating the...
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Exchange 2013: OutlookMailboxDeeptTestProbe fails with Access Denied
I recently had an opportunity to work with a customer who was experiencing unexpected database failovers between nodes. When looking at the ProbeResults log within the ActiveMonitoring crimson event...
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RPC Filtering and Exchange 2010 Database Availability Groups
Recently I’ve had the opportunity to work with customers who were having issues seeding databases using update-mailboxdatabasecopy in Exchange 2010. When attempting to perform an update the following...
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Exchange 2010: Remove-databaseavailabilitygroupserver–configurationOnly does...
Administrators may encounter conditions where DAG members cannot be gracefully removed from a database availability group. For example, a member server may have encountered an unrecoverable failure or...
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Exchange 2013 Cumulative Update 2 – Where are my databases?
In Exchange Server 2013 Cumulative Update 2 (CU2) we introduced support for a maximum of 100 mounted mailbox databases per server (active or passive) when an Enterprise Edition license is applied....
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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...
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Exchange 2013: Health Manager service may not reliably start after server boot.
In Exchange 2013 we have introduced managed availability. The managed availability process runs within the Microsoft Exchange Health Manager service (MSExchangeHMHost.exe). After booting a server it...
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