How to find External Relationships

activites that have exteranl relationships will have an asterick in the start date column

Option 1  go to tools schedule 

select options

then select ignore relationships to and from other projects

option #2

filter for all activities

right click columns 

expand the dates availability on the left and choose

External Early Start and also choose External Early Finish

now in the External Early Start column Blank out the dated 

now do a fill down a

Now do the same thing for the External Early Finish Column

Option #3

go to tools

global change

New (on the right)

Where  (leave this line blank)

then

External Early Start = (leave the rest of the line blank)

and

External Early Finish = (leave the rest of the line blank)

then on the right select change

then commit changes

what ever option that you choose make sure to run the schedule calculations after you run your option

Rodney, take a look here: Listing P6 Inter-Project Relationships | Australasian Project Planning (austprojplan.com.au)

The easiest way is to export the Activity Relationship to Excel. Make sure to include the 'Predecessor Project' and 'Successor Project' columns. You can then filter from these two columns for the external project links to your Project.