diff --git a/atst/routes/portfolios/index.py b/atst/routes/portfolios/index.py
index 6832099b..66bcfa82 100644
--- a/atst/routes/portfolios/index.py
+++ b/atst/routes/portfolios/index.py
@@ -2,6 +2,8 @@ from datetime import date, timedelta
 
 from flask import render_template, request as http_request, g, redirect, url_for
 
+from atst.utils.flash import formatted_flash as flash
+
 from . import portfolios_bp
 from atst.domain.reports import Reports
 from atst.domain.portfolios import Portfolios
@@ -92,7 +94,7 @@ def portfolio_admin(portfolio_id):
 @user_can(Permissions.EDIT_PORTFOLIO_USERS, message="view portfolio admin page")
 def edit_portfolio_members(portfolio_id):
     portfolio = Portfolios.get_for_update(portfolio_id)
-    member_perms_form = MembersPermissionsForm(http_request.form)
+    member_perms_form = member_forms.MembersPermissionsForm(http_request.form)
 
     for subform in member_perms_form.members_permissions:
         new_perm_set = subform.data["permission_sets"]
@@ -101,6 +103,17 @@ def edit_portfolio_members(portfolio_id):
         if portfolio_role.permission_sets != new_perm_set:
             PortfolioRoles.update(portfolio_role, new_perm_set)
 
+    flash("update_portfolio_members", portfolio=portfolio)
+
+    return redirect(
+        url_for(
+            "portfolios.portfolio_admin",
+            portfolio_id=portfolio.id,
+            fragment="portfolio-members",
+            _anchor="portfolio-members",
+        )
+    )
+
     return render_admin_page(portfolio)
 
 
diff --git a/atst/utils/flash.py b/atst/utils/flash.py
index 69239977..11b042e8 100644
--- a/atst/utils/flash.py
+++ b/atst/utils/flash.py
@@ -21,6 +21,13 @@ MESSAGES = {
         """,
         "category": "success",
     },
+    "update_portfolio_members": {
+        "title_template": "Success!",
+        "message_template": """
+            <p>You have successfully updated access permissions for members of {{ portfolio.name }}.</p>
+        """,
+        "category": "success",
+    },
     "new_portfolio_member": {
         "title_template": "Success!",
         "message_template": """
diff --git a/templates/fragments/admin/portfolio_members.html b/templates/fragments/admin/portfolio_members.html
index 452cdfcc..08e856e0 100644
--- a/templates/fragments/admin/portfolio_members.html
+++ b/templates/fragments/admin/portfolio_members.html
@@ -6,7 +6,7 @@
     {% if g.matchesPath("portfolio-members") %}
       {% include "fragments/flash.html" %}
     {% endif %}
-    <form method='POST' action='{{ url_for("portfolios.edit_portfolio_members", portfolio_id=portfolio.id) }}' autocomplete="off">
+    <form method='POST' id="member-perms" action='{{ url_for("portfolios.edit_portfolio_members", portfolio_id=portfolio.id) }}' autocomplete="off" enctype="multipart/form-data">
     {{ member_perms_form.csrf_token }}
 
     <div class='member-list-header'>
@@ -15,10 +15,11 @@
         <div class='subheading'>
           {{ "portfolios.admin.portfolio_members_subheading" | translate }}
         </div>
-        <a class='icon-link'>
-          {{ Icon('info') }}
-          {{ "portfolios.admin.settings_info" | translate }}
-        </a>
+      </div>
+      <a class='icon-link'>
+        {{ Icon('info') }}
+        {{ "portfolios.admin.settings_info" | translate }}
+      </a>
       </div>
 
     {% if not portfolio.members %}