MS Exchange mail level backup that is scheduled to be run on a MS Exchange server is not running. Upon further investigation, the following entries are found in the scheduler debug.log:

[YYYY/MM/DD hh:mm:ss][info][Backup Set (Backup ID)] Start running backup
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set]
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] C:\Program Files\AhsayOBM\bin>SET APP_HOME=..
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set]
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] C:\Program Files\AhsayOBM\bin>SET JAVA_HOME=..\jvm32
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set]
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] C:\Program Files\AhsayOBM\bin>IF NOT EXIST ..\jvm32 SET JAVA_HOME=..\jvm
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set]
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] C:\Program Files\AhsayOBM\bin>SET JAVA_OPTS=-Xms32m -Xmx1024m -Xrs
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set]
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] C:\Program Files\AhsayOBM\bin>SET JAVA_LIB_PATH=-Djava.library.path=..\bin

…

[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] Error occurred during initialization of VM
[YYYY/MM/DD hh:mm:ss][info][OBM.OutputStream][Backup Set] Could not reserve enough space for object heap

Notes:
This issue will only occurs for MS Exchange server with Windows Security Update patch released after 16-04-2009.

Cause:

The messages suggest that the maximum Java heap size set cannot be allocated.

Solution:

To resolve the issue, first we need to amend a file called “RunMailBackup.bat” which is located in ${Install-Home}\bin.

Please open “RunMailBackup.bat” with a text editor and you should see entries as shown below, amend the line by changing the default “-Xmx1024m” value to “-Xmx900m”

SET APP_HOME=..
SET JAVA_HOME=%APP_HOME%\jvm32
IF NOT EXIST %JAVA_HOME% SET JAVA_HOME=%APP_HOME%\jvm
SET JAVA_OPTS=-Xms32m -Xmx1024m -Xrs