What is the maximum portals per mission?

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I want to create a very difficult mission with 200-400 portals. Creating such a mission is a lengthy task. I want to plan ahead how many and which portals I can use, because the layout would be very different if I could use only 50 of 400 planned portals.
What is the maximum of portals I can use in a mission?
update
The mission is up, you can see it here.
I have added 100 portals and then changed their objective and description using* a script, otherwise I would have been still doing it, see yourself:
var scope = angular.element($("#waypoints")).scope();
scope.$apply(function(){
var child = scope.$$childTail;
do {
var wp = child.waypoint;
//console.log(child.$index, wp._poi.title);
wp._show_custom_description = true;
wp.custom_description = "N/A";
wp.objective.type = "INSTALL_MOD"
} while ((child.$first == false) && (child = child.$$prevSibling))
})
*use at Waypoints page.
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What roles are needed to configure a portal?
Required roles and permissions- Portal owner.
- System customizer.
- System administrator.
- Dynamics 365 administrator.
- Power Platform administrator.
- Global administrator.
Where do you write new knowledge articles for the portal?
Create a new category for knowledge articles Sign in to Dynamics 365 Portals. Go to Settings > Service Management. In the Knowledge Base Management section, select Categories. Select New.How do I redeem an invitation code for Power App Portal?
Create invitations from Portal Management appHow do you add attachments in Portal?
To enable attachment on a basic form:MAXIMUM REACHED RP MISSIONS PROBLEM BGMI AND PUBG | HOW TO FIX MAXIMUM REACHED RP MISSIONS
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Images: Erik Mclean, Ann H, Harrison Haines, ROMAN ODINTSOV