Custom Field URL definition

[Serkan Akdağ]

I would like define custom field to get order number from customer and define url on this custom field to forward clicks to our backoffice. 

For example:

order ID: XYZ123

Backoffice link= https://secure.XYZ.com/_admin/new_order.php?orderid=

Is it possible to fill in custom link as: 

https://secure.XYZ.com/_admin/new_order.php?orderid=XYZ123 

and show Order ID = XYZ123 

[Andy Brook]

No, you'll have to implement the addon logic yourself as an Atlassian Connect addon, you can create a cloud addon that is only used by _you_ deployed to the likes of Heroku, providing the performance you require.  See What is Atlassian Connect.