title: Grouping Outlook threads which adds RE every time external parties respond to mails creating multiple threads of single conversation
body: <p>We engage with external vendors on daily basis. However they use some kind of ticketing tool to respond to our mails. Every time they respond to our mails, it adds extra <code>RE</code> to the subject, which ends up creating a separate thread. So for a single case/conversation, we end up getting multiple threads which gets hard to track. Is there any solution in outlook which can group all conversations by removing all <code>RE</code>'s from subject and show it together. Is there any good plugin/Add-in which we can use for this particular case?</p>