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NetVault Plug-in for Exchange 12.3 - User Guide

Introducing NetVault Backup Plug-in for Exchange Defining an Exchange data protection strategy Planning your Exchange Server deployment Installing and removing the plug-in Configuring the plug-in Backing up data Restoring data Troubleshooting

Troubleshooting other issues

This topic describes some common errors and their solutions. In cases where an error occurs and is not described in this table, obtain the Microsoft Exchange Server error number from the NetVault Backup logs, and then see the relevant Microsoft Exchange Server documentation for help.

 
Table 1. Troubleshooting
Error message
Explanation

Failed to Connect or Failed to log in as user <userName>

Ensure that all relevant Exchange Services are started before initiating backup or restore jobs. These services include:

•
Microsoft Exchange Information Store
•
Microsoft Exchange System Attendant
•
Microsoft Software Shadow Copy Provider (VSS backups)
•
Volume Shadow Copy (VSS backups) — started automatically by Microsoft Software Shadow Copy Provider

Failed to get Backup Components

Ensure that Exchange Server databases are mounted.

No Suitable Media for Job

This error occurs when multiple Mailbox Databases are backed up simultaneously by using parallel streams and the number of media drives is less than the number of Mailbox Databases.

An error occurred. Please check that databases are dismounted.

Even if a specific database has been dismounted, if the This database can be overwritten by a restore option is not selected on the Database tab of the Store Properties dialog box, this error occurs.

•
Failed to add backup record
•
Failed to write index of backup to the database

These messages indicate that the selected data was backed up, but the job’s index information was not properly added by NetVault Backup to its database. Without this index information, the data cannot be properly restored.

Method 1:

Open the Manage Devices page, select the backup media, and click Scan. NetVault Backup stores index information for backup jobs in two locations: in the NetVault Database and on the media targeted by the backup. When you scan the backup media, the index information is added to the NetVault Database. To verify that the information was added, open the Manage Job Definitions page, and locate the specific job. If you can run the job now, the scan process has corrected the problem.

Method 2:

If the scan has failed, run the backup job again.

Proxy Master on DAG member server ‘<ServerName>’ died unexpectedly

NetVault Backup uses a threshold for NetVault Backup messages between NetVault Backup Client machines. By default, the threshold is 8 MB. For large Plug‑in for Exchange backups that include several Exchange Server transaction log files, this activity might exceed the threshold. Exceeding the threshold causes the backup to fail and adds the specified error message in the NetVault Backup binary logs.

To increase the NetVault Backup messaging threshold:
1
For each NetVault Backup Client that is part of the DAG, access the NetVault Backup config directory, and use a text editor to modify the “nvnmgr.cfg” file.
2
At the end of the file, add the following entry and specify the value in bytes.
[Network:Message Validation Threshold]
Value=16777216
For example, to increase the level to 16 MB, add the following entry:
[Network:Message Validation Threshold]
Value=16777216
To increase the level to 32 MB, add the following entry:
[Network:Message Validation Threshold]
Value=33554432
3
Save the updated file.
4
Make the same change to the “nvnmgr.cfg” file for every NetVault Backup Client that is part of the DAG.
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