OST Recovery After Deleting Mailboxes due to Database Oversize

A Microsoft Outlook offline folder is like a slave replica of the server-based folder. It provides an easy way to work with your mailbox contents, while the network access is not available. If you delete the master mailbox, the offline folder is orphaned and you cannot access the information. To allow data access from an offline folder, it is necessary that it is converted into .pst file. But there can be situations when you need to delete some of Exchange Server mailboxes. This make corresponding offline folders orphaned. To convert these files into usable .pst files, you need to use a utility that could Convert OST to PST.

For an instance, consider that you try to mount your Exchange Server mailbox store database and it fails logging any of the following events in the application event log:


Event ID: 445
Description: Information Store (3160) The database D:\Program Files\Exchsrvr\MDBDATA\priv1.edb has reached its maximum size of 16383 MB. If the database cannot be restarted, an offline defragmentation may be performed to reduce its size.

Or

Event ID: 1112
Description: The database "Mailbox Store (Server Name)" has reached the maximum allowed size. Attempting to unmount the database.

Cause

This issue might occur if the size of your mailbox store database has reached to its default limit of 16 GB.

Solution

Possible solutions to the given problem are:

1-Install the latest updates available for your Exchange Server
2-Delete some mailboxes to reduce the database size to a level defined within allowed database size. Since the database will not mount in such cases, you will first need to temporarily increase database size by 1 GB by performing registry editing. You can also try deleting unnecessary Outlook contents from individual folders or moving the mailboxes to another server. Perform an offline defragmentation of the database.

If you have deleted a necessary mailbox and no access to valid data backup is available, your .ost file becomes unusable. To Convert OST into a usable .pst file, use an efficient third-party tool. Convert OST to PST tools employ high-end and safe procedures competent to extract .ost file data in all type of cases.

OST to PST Converter is a reliable and safe utility that can Convert OST into .pst file. It is an advanced utility that can recover all email messages, notes, journals, tasks and other Outlook contents. The tool is usable in all cases when .ost file fails to be synchronized. It supports Outlook 2010, 2007, 2003, 2002, 2000, 98 and 97.