Overview

In rare cases, a Kerio Control or KerioConnect Appliance appears offline in the AppManager, resetting the connection doesn't help, and the following error message is present in the AppManager agent logs: "InvalidSignatureException: Signature not yet current." 
The error essentially indicates that there is a time discrepancy that should be addressed. 

Solution

When you see the InvalidSignatureException: Signature not yet current error in the AppManager logs, to resolve this issue:

1. Check the time configuration on the appliance and adjust the time settings to match the current time.
2. Ensure the appliance is synchronized with a reliable time server.

Once the time is correctly set, in a few minutes the appliance should show as online in the AppManager. If the appliance is still offline, follow the corresponding article for your appliance and check for new error messages (the root cause for the online status would change):

• Resetting KerioConnect's Connection to GFI AppManager: A Step-by-Step Guide
  • Resetting GFI Agent Integration with KerioConnect on macOS
• Resetting KerioControl’s connection to GFI AppManager

Summary

When a Kerio Control or KerioConnect Appliance appears offline in the AppManager and displays the error "InvalidSignatureException: Signature not yet current," it indicates a time discrepancy. To resolve this, check and adjust the time settings on the appliance to ensure they match the current time and are synchronized with a reliable time server. After correcting the time, the appliance should appear online in the AppManager within a few minutes.

FAQ

1. What does the "InvalidSignatureException: Signature not yet current" error mean?
   This error indicates that there is a discrepancy between the time settings on the appliance and the current time, preventing proper communication with the AppManager.
2. How can I fix the issue when my appliance shows as offline in the AppManager?
   To fix this, adjust the appliance's time settings to match the current time and ensure synchronization with a reliable time server.
3. What do I do if the issue persists?
   If the issue persists, it means that another error is now causing connection issues. Reset the connection again (following the article for your appliance), and if the issue is still there, check the logs for new error messages.