We are running Exchange 2007 Name : EXCHANGE Edition : Standard AdminDisplayVersion : Version 8.1 (Build 240.6) From my understanding .1 refers to SP1 which supports a database size limit of 75GB. http://technet.microsoft.com/en-us/library/bb232092(EXCHG.80).aspx We currently have a database size of 177GB, however I need to confirm if this is limited in size. I have checked in the registry and there is no DWORD for limiting the size under: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER NAME>\Private-<database GUID> for "Database Size Limit in GB" I am using the following powershell command to confirm the database size: Get-MailboxDatabase | foreach-object {add-member -inputobject $_ -membertype noteproperty -name mailboxdbsizeinGB -value ([math]::Round(([int64](get-wmiobject cim_datafile -computername $_.server -filter ('name=''' + $_.edbfilepath.pathname.replace("\","\\") + '''')).filesize / 1GB),2)) -passthru} | Sort-Object mailboxdbsizeinGB -Descending | format-table identity,mailboxdbsizeinGB Please could someone confirm the database size limit for Exchange 2007 SP1, SP2, SP3? Could someone also confirm how this limit is set if not using the DWORD value? Is the registry key the only way to specify the database size? Is there anyway to specify the warning (eventvwr) for when this size limit is nearly reached? Many Thanks,

Check the event id 1216 You don't need DWORD in 2007 This article will answer all your question, still if you have any, feel free to ask http://blogs.technet.com/b/haroldwong/archive/2007/05/04/exchange-server-2007-standard-edition-unlimited-database-size.aspx Cheers, Gulab | MCITP: Exchange 2010 | MCITP: Exchange 2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.blogspot.com

Thanks for the quick reply :) Just to clarify, Exchange 2007 has no database limit (technically up to 16TB) I found that changing the value of "Database Size Buffer in Percentage" in the registry will specify when the eventvwr alert is trigged. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER NAME>\Private-<database GUID> "Database Size Buffer in Percentage" (http://technet.microsoft.com/en-us/library/aa998066(EXCHG.65).aspx) Many Thanks,

Thats the Key and location you can set the size limit. To be honest i never saw anyone setting up limit on Database size on 2007, to avoid increasing the size of the database you should spread the mailboxes across the database. But yes thats the Registry Key to set the limit. Cheers, Gulab | MCITP: Exchange 2010 | MCITP: Exchange 2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.blogspot.com

I understand. We currently have disk space issues, therefore trying to prevent the DB from getting too large and corrupting. I will do some research on spreading the mailboxes across the database. Thanks,