Using the AuthAnvil 2FA Addin for Kaseya 6.3, logging into Kaseya with a Portal Access user redirects the user back to the login screen without showing a success or failure.
A change in Kaseya's Portal Access functionality for Kaseya v6.3 is sending data that the AuthAnvil 2FA Addin does not expect.
Open up the AuthAnvil.asp file (C:\Kaseya\WebPages\AuthAnvil\inc\AuthAnvil.asp) and near line 215 you will find the following line of code:
Session("passThrough").setSelect = "";
Add the following line to reflect this change:
Session("passThrough").loginState = 8; Session("passThrough").setSelect = "";
Save the file and test a login with a Portal Access account. It should log in to KLC successfully.
AuthAnvil 2FA Addin v18.104.22.168 or earlier