MS Exchange database routine checks

MS Exchange MDBDATA limit check:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<Server Name>\Private-<database GUID>
Get-MailboxDatabase -Status

Get-MailboxDatabase “Mailbox Database” | Get-MailboxStatistics | Sort totalitemsize -desc | ft displayname, totalitemsize, itemcount

Database Max Size of database
Get-MailboxDatabase -Identity "<database name>" | Format-Table Name, GUID