First, Microsoft doesn’t mind if you make this change (although it
encourages you to be careful editing your Registry). In fact, Microsoft
tells us how to do it in the TechNet Center. To modify the database
size limit, perform the following on the Exchange Server:
1. | Click Start, Run.
| 2. | Open your Registry Editor by typing regedit and pressing Enter.
| 3. | Navigate
to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER
NAME>\Private-<database GUID> (Note: If you aren’t sure the GUID of your database, run the Get-MailboxDatabase "Name of Database" | fl command in the Exchange Management Shell and it tells you the GUID to look for.)
| 4. | Look for the DWORD
called Database Size Limit in GB. If you find it, change the subkey
value to the size you want. If the key doesn’t exist, create a key with
that name and put the value in. |
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