Problem backing up mailbox greater than 2 GB through ExMerge

I have downloaded and copied ExMerge to the Program Files\Exchsrv\bin folder and given permissions (Send As and Receive As) required to run ExMerge. But when I run ExMerge every time it backs up mailbox upto 2 GB for mailboxes greater than 2 GB in size and then it stops. It does fine for smaller mailboxes. How could I resolve this issue or is there any other tool that  can use to resolve this issue.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

PST files have a hard limit of 2Gb imposed by Microsoft.

You can tell exmerge to export data between two dates to reduce the amount of mail being exported, but this means you will have more than one PST per mailbox over 2Gb
Lee W, MVPTechnology and Business Process AdvisorCommented:
PST Files that ExMerge USE are 2GB hard limits.  Since 2003 version of Outlook, Outlook uses Unicode in the PST files and they can now go FAR beyond the 2 GB limit.  Unfortunately, this does not help in this case because Exmerge will not use Unicode formatted PST files.  Further, once the PST file is created, you cannot change it's type - so don't expect to use a ANSI based ExMerge or Pre-Outlook 2003 PST file in Outlook 2003 or 2007 and be able to go beyond the limit... it will corrupt the file.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Jerry SolomonNetwork  AdministratorCommented:
The answer to this problem is to use a client computer to create the PST file.  As was mentioned above Outlook 2003 or later can create a pst larger than 2GB with no problems.  From the client computer, click file--export to create a PST of the entire mailbox.  Save it directly to the client C drive, or anywhere alse outside fo the user's profile. Then you can File--import it back in at the client once you are all set up on the new domain. I always cover my bases and do this even when using EXMERGE--its and extra layer of protection against being the bad guy with an email did not export properly.
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

anas_elkhaniAuthor Commented:
i'm trying to automate the whole process and schedule a batch file that will do it daily.
Jerry SolomonNetwork  AdministratorCommented:
Why not just use a program like Symantec BackupExec, which allows you to restore single mailbox items instead of fighting with a tool never meant for this application?

There is a workaround to back up larger mailboxes with exmerge:

You can extract the mailbox into two or more PSTs based on the date. With the utility, you can click Options--Data Selection Criteria dialog box, and select the Dates tab. From there, you can extract the mailbox contents to a PST file based on message dates.

Now scripting that could be a challenge.

Jerry SolomonNetwork  AdministratorCommented:
To approach scripting something like this, manually run Exmerge from the gui as I stated above, then look at the exmerge.ini and the mailboxes.txt files it created to see if they have what you need in them to save those, and then script it from there.

good luck!!
Jerry SolomonNetwork  AdministratorCommented:
I'm guessing you been reading up on automating brick-level backups of Exchange on Petri:
If not, this will help you aout quite a bit.

Jerry SolomonNetwork  AdministratorCommented:
There is a program called BackupAssist with the exchange add-on will perform this function on an automated schedule.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.