Set Database Size Limit More Than 18GBs

Add D word: “Database Size Limit in GB“, and set the number of Gigs (in decimal)

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSExchangeIS<Servername>Private-GUID

*Note (Added by Tracy) – The information store must be dismounted/mounted or the Information Store service must be restarted for this to take effect.