Event ID - 26

Event Id26
SourceApplication Popup Event
DescriptionAvailable in database--Application popup: Citrix ICA Logon Message: The system has reached its licensed logon limit. Please try again later
Event InformationAccording to .kbalertz:
Cause:

This behavior can be caused by a problem with the Citrix MetaFrame XP licensing software. After Citrix MetaFrame XP licenses are upgraded from Citrix MetaFrame 1.8, the Citrix licensing program sees the licenses as migration licenses. The behavior is not caused by Terminal Server licensing.

Resolution:
To resolve this behavior, uninstall the Citrix MetaFrame XP licenses, install the original Citrix MetaFrame 1.8 licenses, and then reinstall the Citrix XP connection licenses. Also, you may be able to resolve this behavior by installing Feature Release 1 License. For more information, contact Citrix technical support at 1-800-424-8749.
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products
Reference Linksevent id: 26 and source:Application Popup Event

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