How to merge conversations
There may come a time where you have two separate conversations about the same thing. In those cases, merging the conversations can help your productivity.
You can merge emails and tweets.
If the number of messages across all conversations you're merging exceeds 100, or if the number of activities across the conversations exceeds 100, then you will receive an error that says "These conversations are too big to be merged."
Highlight the conversations you wish to merge, and click the conversation menu. Select Merge conversations.
An alert will pop up confirming that you want to merge these conversations. If you're ready, select Merge. Keep in mind, this cannot be undone.
The messages will them appear as one conversation. If the conversations you are merging have different subjects, the subject applied will be the subject of the conversation with the most number of messages, activities, and assignees.