Event ID - 7200

Event Id7200
SourceMSExchangeIS Mailbox Store
DescriptionBackground thread <thread id> halted on database "<name>" due to error code <error code>.
Event InformationThe Information Store runs many tasks and performs maintenance operations in the background. Problems may occur when the maximum size paged or non-paged pool that can be allocated by one process has been limited on the Exchange server. The default value of these registry keys is 0. If a value between 1 and 128 has been specified, no single process can allocate more space in the pool than the specified amount. When the value of these registry keys is set to 0, there are no pool quotas. Make sure these registry keys are set to the default value of 0.

According to Microsoft:
CAUSE 2.:
This issue can occur if Exchange 2000 reads this interval time and the service is not running; Exchange 2000 logs the error because Exchange 2000 determines that the service should be on.
RESOLUTION 2.:
1. Enable full-text indexing for the information store that is being affected:a. Start Exchange System Manager for Exchange 2000.
b. Click to expand the Organization object, click to expand the Site object, and then click to expand the Servers object. Click the Server_name object, click the Storage_group_name object, and then click the Mailbox Store object.
c. Right-click the Mailbox Store object, and then click Create Full-Text Indexing on the shortcut menu.
d. Click OK to the catalog path.
2. Wait until full-text indexing is enabled; this may take some time for large information stores. Right-click the Mailbox Store object, and then click Properties on the shortcut menu.
3. Click the Full-Text Indexing tab, and then change the interval back to Never.
4. Disable full-text indexing for the information store:a. Click to expand the Organization object, click to expand the Site object, and then click to expand the Servers object. Click the Server_name object, click the Storage_group_name object, and then click the Mailbox Store object.
b. Right-click the Mailbox Store object, and then click Delete the Full-Text Indexing on
Reference LinksMSExchangeIS Mailbox Store Is Logged in Application Event Log Every 15 Minutes
Timed Events Are Not Processed

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