Download Andy-AutoPrefixByLastPost-1.2.zip and unzip it. Copy the src/addons/Andy/AutoPrefixByLastPost directory to your server. From the Admin Control Panel Install the add-on.

Select the appropriate 'Include forums'. Update the three prefix IDs with the correct thread prefix IDs.

Auto change thread prefix based on last post user.This add-on is ideal for a support ticket forum. The thread prefix is automatically changed depending on the last post user. For example if a member starts a support ticket the prefix will be automatically set to "Awaiting staff reply" and when the staff replies it will automatically be set to "Awaiting member reply" and so on. When the member gets his question answered, staff will use the Status button to change the prefix to Resolved.(Example of thread)(Example of Thread prefixes)(Example of Options page)(Example of User group permissions)Select Yes for the user group which will answer members questions.Q: Why is the quick editor box replaced by a Reply button?A: This is done in order to always show the correct thread prefix.Q: How do I determine the prefix ID?A: In the Thread prefixes page, hover your cursor over the thread prefix, the number near the end of the URL is the thread prefix ID.