If the user clicks Upgrade, and the upgrade is successful, the value of this variable is set to the same value as the environment variable Setup in the upgraded Notes Client. For example, if a client is upgraded to Notes version 6.04, the variable is set like this:
MailSetup=600400
If the user clicks Cancel, but does not select "Don't show this message again," the value of this variable is set to 1. When the user opens their mail file, the Upgrade Mail File Design dialog will appear again.
If the user clicks Cancel, and also selects "Don't show this message again," a dialog box appears informing the user to contact their administrator about upgrading the mail file. If the user clicks OK in this dialog box, the value of this variable is set to -1. The Upgrade Mail File Design dialog box does not appear again.
This setting is new in ND6