Set workflow preferences

Select  Edit > Preferences > Workflow (Windows) or Adobe Bridge > Preferences > Workflow (macOS) 

In the Preferences dialog box that opens, select Workflow.

In the Workflow Progress Dialog section, set the preferences for the following information:

• Maximum number of workflow jobs to keep in job list: Manually enter the desired value. The maximum number of job details in the job progress dialog defaults to a max value of 100. Bridge deletes the older history beyond 100 job details.
• Maximum number of workflow jobs in progress: Manually enter the desired value. You can queue 20 export jobs at a time. 

Select OK.