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A Citrix Workspace App upgrade, and suddenly automatic sign-in to StoreFront stops working.
These issues are particularly interesting because the cause is not necessarily where you first expect it.
The symptoms:
❌ Windows logon works normally
❌ StoreFront requests a username and password again
❌ Domain pass-through authentication no longer works
✅ SSO worked before switching to the native x64 Workspace App
The first suspects are often Kerberos, GPOs, StoreFront or the SSON component.
The actual cause:
Citrix documents a known issue with domain pass-through authentication in Workspace App 2607 LTSR x64.
Registration of the cck.dll component may be missing or incorrect in the 64-bit registry branch.
🛠️ The workaround
On the affected client, registration can be corrected using the following command:
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reg add "HKLM\SOFTWARE\Citrix\Receiver\Modules\cck.dll" /v X64 /t REG_SZ /d "C:\Program Files\Citrix\ICA Client\Receiver\cck.dll" /f /reg:64 |
Then exit Workspace App completely and test the sign-in again.
My takeaway:
If StoreFront SSO suddenly fails after a Workspace App upgrade, I would not immediately dismantle the entire authentication chain.
First, I check the client version, architecture and registration of the components involved.
A small registry entry can make the decisive difference here.
⚠️ This workaround applies to the documented symptoms and should be tested before a broad rollout.
