Not all 106 are created equal

Of course that’s not accurate. When MSExchange Common source writes an event 106 about performance counters, the format of each event is exactly the same and reads: ID:       106 Level:    Error Source: MSExchange Common Machine:  server1.contoso.com Message:  Performance counter updating error. Counter name is <counter name here>, category name is <category name here>. Optional code:…

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Why does mailbox size increase by 30-40% when moved to Exchange 2013/2016?

We get this question very often and its answer is right on the Exchange’s release notes “Mailbox size increase when migrating from previous Exchange versions“.  However, I wanted to provide a little more detail along with good resources already on the web. In Exchange 2013/2016 the mailbox size calculation, includes space that was not accounted for before, but effectively was part of messaging…

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Error accessing Public Folders Hierarchy in coexistence environment 2007-2013

This is a specific issue we have encountered in several deployments, for customers migrating from Exchange 2007 to Exchange 2013, or simply by having the two versions coexisting in their environments due to specific requirements. When you attempt to manage your legacy Public Folders from the Public Folder Management console in this scenario, you can connect to the…

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Alternate way to get your Exchange build numbers

I wanted to share a little script that turned to be very useful for me. Get-ExchBuild.ps1 lists the build numbers for all versions of Exchange listed in the official TechNet page, but from the convenience of the PS command line. You can run it without parameters to return them all, or restrict the output to certain…

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