Event ID 9688 and 9685

KB ID 0000266


Event ID 9688 and / or Event ID 9685

Event 9688

Exchange store ‘First Storage GroupMailbox Store (SERVER)’: The logical size of this database (the logical size equals the physical size of the .edb file and the .stm file minus the logical free space in each) is x GB. This database size is approaching the size limit of x GB.

Event 9685

The current physical size of this database (the .edb file and the .stm file) is {number} GB. This database has exceeded the size limit of {number} GB. However, the logical free space in this database has not yet been evaluated. Therefore, it is possible that this database contains enough free space to bring its logical size below the maximum size limit.

If the logical database size exceeds the maximum size limit, it will be dismounted on a regular basis.

Seen on Exchange 2003 with SP2 – the database is approacing the maximum size and the server is starting to warn you.

Event 9688

event 9685


1. On the Exchange Server Start > Run regedit {enter}

2. Navigate to HKLMSystemCurrentControlSetServicesMSExchangeIS{server name}

3. There will be a sub key called Private-{big long GUID} > Select it.

Note: If your “Public Folder database” is the offender than that will be called Public-Private-{big long GUID}

4. Change the “Default Size Limit in GB” key accordingly. Note: Set the value to Decimal!

exchange database limit

Exchange 2003 Database Size Limits

Exchange Standard 2003 Pre SP2 – 16GB Exchange Standard 2003 Post SP2 – 75GB (SP2 Default 18GB). Exchange Enterprise 2003 Pre SP2 – 8000 GB Exchange Enterprise 2003 Post SP2 – 8000 GB (SP2 Default 8000GB).

5. Finally you will need to restart the “Microsoft Exchange Information Store Service”, from command line issue the following commands,

net stop "Microsoft Exchange Information Store" /y
net start "Microsoft Exchange Information Store" /y

Stop information store service

Related Articles, References, Credits, or External Links


Author: Migrated

Share This Post On