Extending Database Size limit for Exchange 2010 Standard edition

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 50 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.

1. Start Registry Editor (regedit).
   
2. Locate the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER NAME>\Private-<database GUID>
   
3. If the Database Size Limit in GB DWORD exists for the subkey, change its value to the desired size in gigabytes.
   
4. 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.
   

 

You can get the database guide by the below powershell cmdlet

Get-MailboxDatabase -Identity "<server name>\<database name>" | Format-Table Name, GUID