User information is stored in an XML file in Syncrify. This XML file is located in $INSTALL_DIR\config\UserMappings.xml. If for any reason this XML file gets corrupted, you won't see any users in Syncrify.

As a precaution, Syncrify makes a backup of the entire config folder into 7 zipped files (one for every weekday) that are found in $INSTALL_DIR\config\archives folder, allowing administrators to restore any file in case something goes wrong. You can restore UserMappings.xml file using the following steps below:

• First, locate the last good backup. Extract the most recent zipped file and check if the length of UserMappings.xml is greater than a few KB. On Windows, the XML extension is typically associated with Internet Explorer, which does a good job of not only displaying XML content but also verifying it. If you get an error opening the XML file, move on to the previous backup.
• Stop Syncrify Server if it is running
• Replace the bad UserMappings.xml file from $INSTALL_DIR\config folder with a good one from the backup.
• Restart Syncrify and verify the users are back.

A better approach