Troubleshooting Slow Logon in Citrix Xenapp

Logons to Citrix Xenapp environment can be divided into following phases-

PHASE 1: USER PROFILE LOADING
PHASE 2: APPLYING GROUP POLICY OBJECTS (GPOS)
PHASE 3: USER ENVIRONMENT INITIALIZATION AND ACTIVE SETUP
PHASE 4: LOGON SCRIPT EXECUTION
PHASE 5: CITRIX APPLICATION INITIALIZATION

 

PHASE 1: USER PROFILE LOADING
Reasons for slow logon phase are:-
•  issues with network and profile storage availability,
•  high network load,
•  big profile size,
•  first time use of this profile on the server (the cached version of the roaming profile does not
exist), or
•  the corrupted profile

PHASE 2: APPLYING GROUP POLICY OBJECTS (GPOS)
Reasons for the slow logon phase are:
•  issues with required infrastructure (required services and components are either not running
or configured as expected),
•  issues with network and domain controller availability,
•  system time is not configured correctly,
•  high network load, or
•  the high amount of policy settings

PHASE 3: USER ENVIRONMENT INITIALIZATION AND ACTIVE SETUP
Reasons for the slow logon phase are:
•  issues with restoring the network connection(s),
•  the corrupted profile, or
•  first time use of this profile on the server (Active Setup hasn't been applied yet).

PHASE 4: LOGON SCRIPT EXECUTION
Reasons for the slow logon phase are:
•  issues with application compatibility scripts,
•  legacy applications, or
•  custom profile initialization.


PHASE 5: CITRIX APPLICATION INITIALIZATION
Reasons for the slow logon phase are:
•  issues with the client printer (usually third party printer drivers) or
•  issues with retrieving ICA client version and the rest of the update process. 

Process Diagram showing logon -