As many of you know PHP5 Breaks Horde.

It's fairly easy to get it working and fix it, but you have to run it as ISAPI.

First download the non-install version.

Copy /swsoft/plesk/additional/php to php4

Then overwrite php with the php 5, download the pcl and copy it to extensions.

Copy over the php.ini.recommended to c:\windows.

Go into IIS webmail/horde and properties.

Go to home directory, configuration for the application and set it to grab php.exe from php4 instead of php.

EDIT: To Make CLI work rename php-cgi.exe to php.exe

 

Thank you for your toturial.
I will try it, thank you very Dutch.