Multiple authentication prompts for Microsoft outlook through Citrix ADC load balancers for exchange.

• Match the time on Citrix ADC with the backend exchange servers and make sure they are the same
• If you have more than 1 backend servers, make sure the persistence method is applied.
• If using SourceIP persistence method change it to cookie insert and vice versa.

Problem Cause

• Time mismatch between the backend server and the Citrix ADC
• Persistency method missing from the load balancer
• Incorrect persistency method configured