The ArcGIS community has long requested the ability to bring maps from ArcGIS Pro into Adobe Illustrator. The ArcGIS Maps for Adobe team has been collaborating with the ArcGIS Pro team to design a supporting workflow.
At ArcGIS Pro 2.5, you can now export a map or layout from ArcGIS Pro to an Adobe Illustrator Exchange (AIX) file format. Then you can use this AIX file with ArcGIS Maps for Adobe 2.0 (beta) version available here to convert a map into layered artwork for use in Illustrator. Once you convert the map, you can style and manipulate the resulting artwork with the graphic editing tools in Illustrator.
ArcGIS Maps for Adobe 2.0 (Beta) is now available so you can evaluate this new integration and provide us feedback. Please see the requirements below to sign up for the beta program.