'Find a colleague' on mobile application not only displays where your colleague is present but also allows you to book a desk next to your colleague.

So, you were getting the error of 'No desk available for the selected search criteria' because of the below group setting

The purpose of this setting is to either allow to book more than one desk on that group (if enabled) or to restrict the users to not book the desk if they already have the desk booked on that group (if disabled)

1. Disabled: Lets suppose we have two users (User A and User B) -

   Scenario 1: User A has no desk booked for 15th February, but User B has a desk booked for 15th. When User A tries to search for user B under 'Find a colleague' in mobile application and click on the desk of User B to see where he's sitting in floor plan, he'll be able to see the same without any issues and User A can also book a desk near to User B.
   
   Scenario 2 : User A and User B both have a desk booked for 15th Febuarary. When User A tries to search for User B under 'Find a colleague' in mobile app and clicks on the desk of User B, he'll get an error saying 'No desk available for the selected search criteria' which restricts User A from opening the floor plan because booking another desk for User A is not allowed as per group settings.
   

   1. Enabled: Lets suppose we have two users (User A and User B) -

      Scenario 1: User A has no desk booked for 15th February, but User B has a desk booked for 15th. When User A tries to search for user B under 'Find a colleague' and click on the desk of User B to see where he's sitting in floor plan, he'll be able to see the same without any issues and User A can also book a desk near to User B.

      Scenario 2: User A and User B both have a desk booked for 15th February. When User A tries to search for User B under 'Find a colleague' in mobile app and clicks on the desk of User B, he'll be able to see the same without any issues and User A can book another desk for himself even though he already has that desk since this setting is enabled.

Meaning this setting allows us to search for colleagues on the mobile app on the current day, but will allow for any user to book 2 workstations on the same day!
Or
We block the ability to find users on the same day on the mobile app, and all users will only be able to book 1 workstation!