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Breaking the Exchange 2010 SP2 softly enforced 1TB limit August 6, 2012

Posted by vbry21 in Exchange 2010.
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On the Exchange 2010 SP2 course (10135B), we talk about the two different editions of Exchange 2010.

These are Standard and Enterprise.

Standard allows five databases and has no software limit for the size of the storage, we are purely constrained by the hardware.

Enterprise allows one hundred databases and again has not software limit.

However in Standard edition if we want to exceed the 1TB limit we must enable this setting in the registry.

You can use Registry Editor to modify a database size limit in Microsoft Exchange Server 2010. The default database size limit for Exchange 2010 Standard Edition is 1024 gigabytes (GB). There is no default database size limit for the Exchange 2010 Enterprise Edition. The Exchange store checks any database size limits periodically and dismounts a database when the size limit is reached. You can modify the database size limit by adding or changing a value in the registry.

When you change this setting, this change is propagated to all servers that host a copy of this database.

  1. Start Registry Editor (regedit).
  2. Locate the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<Server Name>\Private-<database GUID>


You can get the GUID of a database by running the following command in the Exchange Management Shell: Get-MailboxDatabase -Identity “<database name>” | Format-Table Name, GUID
  1. If the Database Size Limit in GB DWORD exists for the subkey, change its value to the desired size in gigabytes.
  2. If the Database Size Limit in GB DWORD doesn’t exist for the subkey, create a new DWORD with that name, and then set its value to the desired size in gigabytes.



Virtualise Exchange 2010, OK let’s do it May 26, 2012

Posted by vbry21 in General Stuff.
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One of the questions I’m asked more than any other when teaching the Microsoft Exchange course is.

“Can I virtualise Exchange Server 2010?”

My answer is always “Yes”.

I’ve done it quite a few times now and every time it has been successful. Really what it all comes down to is planning and ensuring that you take your time, and that you decide whether you want to consolidate all roles into one server, or split the roles. This will affect performance.

Both VMware and Microsoft produce some fantastic guides to doing just this.

The VMware guide can be found at


Microsoft’s guide can be found at


I’ve used both this guides, I’ve virtualised Exchange on VMware ESXi and also on Hyper-V.

The other question is which one does it best, and the answer is “                 “, sorry the keyboard has gone faulty, the answer is, really it depends on what you’ve got, so do you have ESXi? If the answer yes then this is the best product. Do you have Hyper-V? Then this is the best product.

In my experience, both do the job well.