diff --git a/coldfront/config/plugins/ifx.py b/coldfront/config/plugins/ifx.py
index 616fb534c..b75993786 100644
--- a/coldfront/config/plugins/ifx.py
+++ b/coldfront/config/plugins/ifx.py
@@ -25,6 +25,9 @@ class GROUPS():
 class RATES():
     INTERNAL_RATE_NAME = 'Harvard Internal Rate'
 
+class EMAILS():
+    DEFAULT_EMAIL_FROM_ADDRESS = 'rchelp@rc.fas.harvard.edu'
+
 # Ignore billing models in the django-author pre-save so that values are set directly
 AUTHOR_IGNORE_MODELS = [
     'ifxbilling.BillingRecord',
@@ -38,3 +41,7 @@ class RATES():
 
 IFXREPORT_FILE_ROOT = os.path.join(MEDIA_ROOT, 'reports')
 IFXREPORT_URL_ROOT = f'{MEDIA_URL}reports'
+
+# Class to be used for rebalancing
+REBALANCER_CLASS = 'coldfront.plugins.ifx.calculator.ColdfrontRebalance'
+
diff --git a/coldfront/plugins/ifx/calculator.py b/coldfront/plugins/ifx/calculator.py
index 0adf7209e..a8526d302 100644
--- a/coldfront/plugins/ifx/calculator.py
+++ b/coldfront/plugins/ifx/calculator.py
@@ -10,7 +10,7 @@
 from django.utils import timezone
 from django.contrib.auth import get_user_model
 from django.conf import settings
-from ifxbilling.calculator import BasicBillingCalculator, NewBillingCalculator
+from ifxbilling.calculator import BasicBillingCalculator, NewBillingCalculator, Rebalance
 from ifxbilling.models import Account, Product, ProductUsage, Rate, BillingRecord
 from ifxuser.models import Organization
 from coldfront.core.allocation.models import Allocation, AllocationStatusChoice
@@ -29,7 +29,7 @@ class NewColdfrontBillingCalculator(NewBillingCalculator):
     STORAGE_QUOTA_ATTRIBUTE = 'Storage Quota (TB)'
     STORAGE_RESOURCE_TYPE = 'Storage'
 
-    def calculate_billing_month(self, year, month, organizations=None, recalculate=False, verbosity=0):
+    def calculate_billing_month(self, year, month, organizations=None, user=None, recalculate=False, verbosity=0):
         '''
         Calculate a month of billing for the given year and month
 
@@ -47,6 +47,9 @@ def calculate_billing_month(self, year, month, organizations=None, recalculate=F
         :param organizations: List of specific organizations to process.  If not set, all Harvard org_tree organizations will be processed.
         :type organizations: list, optional
 
+        :param user: Limit billing to this year.  If not set, all users will be processed.
+        :type user: :class:`~ifxuser.models.IfxUser`, optional
+
         :param recalculate: If set to True, will delete existing :class:`~ifxbilling.models.BillingRecord` objects
         :type recalculate: bool, optional
 
@@ -66,7 +69,7 @@ def calculate_billing_month(self, year, month, organizations=None, recalculate=F
 
         results = {}
         for organization in organizations_to_process:
-            result = self.generate_billing_records_for_organization(year, month, organization, recalculate)
+            result = self.generate_billing_records_for_organization(year, month, organization, user, recalculate)
             results[organization.name] = result
 
         if year == 2023 and (month == 3 or month == 4):
@@ -74,7 +77,7 @@ def calculate_billing_month(self, year, month, organizations=None, recalculate=F
 
         return Resultinator(results)
 
-    def generate_billing_records_for_organization(self, year, month, organization, recalculate, **kwargs):
+    def generate_billing_records_for_organization(self, year, month, organization, user, recalculate, **kwargs):
         '''
         Create and save all of the :class:`~ifxbilling.models.BillingRecord` objects for the month for an organization.
 
@@ -102,6 +105,9 @@ def generate_billing_records_for_organization(self, year, month, organization, r
         :param organization: The organization whose :class:`~ifxbilling.models.BillingRecord` objects should be generated
         :type organization: list
 
+        :param user: Limit billing to this user.  If not set, all users will be processed.
+        :type user: :class:`~ifxuser.models.IfxUser`
+
         :param recalculate: If True, will delete existing :class:`~ifxbilling.models.BillingRecord` objects if possible
         :type recalculate: bool
 
@@ -587,7 +593,8 @@ def generate_billing_records_for_allocation_user(self, year, month, user, organi
 
         if BillingRecord.objects.filter(product_usage=product_usage).exists():
             if recalculate:
-                BillingRecord.objects.filter(product_usage=product_usage).delete()
+                for br in BillingRecord.objects.filter(product_usage=product_usage):
+                    br.delete()
             else:
                 msg = f'Billing record already exists for usage {product_usage}'
                 raise Exception(msg)
@@ -733,6 +740,24 @@ def get_errors_by_organization(self, organization_name=None):
                     errors_by_lab[lab] = output[1]
         return errors_by_lab
 
+    def get_other_errors_by_organization(self, organization_name=None):
+        '''
+        Return dict of all of the "Other" errors keyed by lab
+        '''
+        errors_by_lab = {}
+        for lab, output in self.results.items():
+            if output[1] and 'No project' not in output[1][0]:
+                if organization_name is None or lab == organization_name:
+                    for error in output[1]:
+                        for error_type, regex in self.error_types.items():
+                            if error_type == 'Other' and re.search(regex, error):
+                                if lab not in errors_by_lab:
+                                    errors_by_lab[lab] = []
+                                errors_by_lab[lab].append(error)
+                            elif re.search(regex, error):
+                                break
+        return errors_by_lab
+
     def get_successes_by_organization(self, organization_name=None):
         '''
         Return dict of successes keyed by lab
@@ -771,3 +796,59 @@ def get_organizations_by_error_type(self):
                                 errors_by_type[error_type].append(lab)
                                 break
         return errors_by_type
+
+
+class ColdfrontRebalance(Rebalance):
+    '''
+    Coldfront Rebalance.  Does not do a user-specific rebalance, but rather the entire organization so that offer letter reprocessing is done.
+    '''
+
+    def get_recalculate_body(self, user, account_data):
+        '''
+        Get the body of the recalculate POST
+        '''
+        if not account_data or not len(account_data):
+            raise Exception('No account data provided')
+
+        # Figure out the organization that needs to be rebalanced from the account_data
+        organization = None
+        try:
+            account = Account.objects.filter(ifxacct=account_data[0]['account']).first()
+            organization = account.organization
+        except Account.DoesNotExist:
+            raise Exception(f'Account {account_data[0]["account"]} not found')
+
+        return {
+            'recalculate': False,
+            'user_ifxorg': organization.ifxorg,
+        }
+
+    def remove_billing_records(self, user, account_data):
+        '''
+        Remove the billing records for the given facility, year, month, and organization (as determined by the account_data)
+        Need to clear out the whole org so that offer letter allocations can be properly credited
+        '''
+        if not account_data or not len(account_data):
+            raise Exception('No account data provided')
+
+        # Figure out the organization that needs to be rebalanced from the account_data
+        organization = None
+        try:
+            account = Account.objects.filter(ifxacct=account_data[0]['account']).first()
+            organization = account.organization
+        except Account.DoesNotExist:
+            raise Exception(f'Account {account_data[0]["account"]} not found')
+
+        if not organization:
+            raise Exception(f'Organization not found for account {account_data[0]["account"]}')
+
+        # Remove the billing records for the organization
+        billing_records = BillingRecord.objects.filter(
+            product_usage__product__facility=self.facility,
+            account__organization=organization,
+            year=self.year,
+            month=self.month,
+        ).exclude(current_state='FINAL')
+
+        for br in billing_records:
+            br.delete()
diff --git a/coldfront/plugins/ifx/templates/plugins/ifx/calculate_billing_month.html b/coldfront/plugins/ifx/templates/plugins/ifx/calculate_billing_month.html
index db386b09d..9c8214b11 100644
--- a/coldfront/plugins/ifx/templates/plugins/ifx/calculate_billing_month.html
+++ b/coldfront/plugins/ifx/templates/plugins/ifx/calculate_billing_month.html
@@ -138,7 +138,7 @@
 
                 $.ajax({
                     contentType: 'application/json',
-                    url: `/ifx/api/calculate-billing-month/${year}/${month}/`,
+                    url: `/ifx/api/billing/calculate-billing-month/RC/${year}/${month}/`,
                     method: 'POST',
                     headers: {'X-CSRFToken': '{{ csrf_token }}'},
                     data: data,
@@ -161,9 +161,10 @@
                     error: function (jqXHR, status, error) {
                         alert(status + ' ' + error)
                     },
-                }).success(
-                    alert('Update started.  You will receive an email when the update is complete.')
-                )
+                    success: function () {
+                        alert('Update started.  You will receive an email when the update is complete.')
+                    }
+                })
             })
         })
     })(jQuery)
diff --git a/coldfront/plugins/ifx/urls.py b/coldfront/plugins/ifx/urls.py
index 14521eaf8..b2172af71 100644
--- a/coldfront/plugins/ifx/urls.py
+++ b/coldfront/plugins/ifx/urls.py
@@ -21,7 +21,7 @@
     path('api/billing/get-summary-by-account/', ifxbilling_views.get_summary_by_account),
     path('api/billing/get-pending-year-month/<str:invoice_prefix>/', ifxbilling_views.get_pending_year_month),
     path('api/billing/rebalance/', ifxbilling_views.rebalance),
-    path('api/calculate-billing-month/<int:year>/<int:month>/', calculate_billing_month, name='calculate-billing-month'),
+    path('api/billing/calculate-billing-month/<str:invoice_prefix>/<int:year>/<int:month>/', calculate_billing_month, name='calculate-billing-month'),
     path('api/run-report/', run_report),
     path('api/get-org-names/', get_org_names, name='get-org-names'),
     path('api/get-product-usages/', get_product_usages, name='get-product-usages'),
diff --git a/coldfront/plugins/ifx/views.py b/coldfront/plugins/ifx/views.py
index 30aef1136..c914fd54e 100644
--- a/coldfront/plugins/ifx/views.py
+++ b/coldfront/plugins/ifx/views.py
@@ -94,19 +94,20 @@ def get_billing_record_list(request):
         raise PermissionDenied
     return ifxbilling_get_billing_record_list(request._request)
 
-@login_required
 @api_view(['POST',])
 @permission_classes([AdminPermissions,])
-def calculate_billing_month(request, year, month):
+def calculate_billing_month(request, invoice_prefix, year, month):
     '''
     Calculate billing month view
     '''
     logger.error('Calculating billing records for month %d of year %d', month, year)
     recalculate = False
+    user_ifxorg = None
     try:
         data = request.data
-        logger.error('Request data: %s', data)
         recalculate = data.get('recalculate') and data['recalculate'].lower() == 'true'
+        if data and 'user_ifxorg' in data:
+            user_ifxorg = data['user_ifxorg']
     except Exception as e:
         logger.exception(e)
         return Response(data={'error': 'Cannot parse request body'}, status=status.HTTP_400_BAD_REQUEST)
@@ -114,11 +115,24 @@ def calculate_billing_month(request, year, month):
     logger.debug('Calculating billing records for month %d of year %d, with recalculate flag %s', month, year, str(recalculate))
 
     try:
+        organizations = ifxuser_models.Organization.objects.filter(org_tree='Harvard')
+        if user_ifxorg:
+            organizations = [ifxuser_models.Organization.objects.get(ifxorg=user_ifxorg)]
+
         if recalculate:
-            ifxbilling_models.BillingRecord.objects.filter(year=year, month=month).delete()
+            for br in ifxbilling_models.BillingRecord.objects.filter(year=year, month=month):
+                br.delete()
             ifxbilling_models.ProductUsageProcessing.objects.filter(product_usage__year=year, product_usage__month=month).delete()
         calculator = NewColdfrontBillingCalculator()
-        calculator.calculate_billing_month(year, month, recalculate=recalculate)
+        resultinator = calculator.calculate_billing_month(year, month, organizations=organizations, recalculate=recalculate)
+        successes = 0
+        errors = []
+        for org, result in resultinator.results.items():
+            if len(result[0]):
+                successes += len(result[0])
+        errors = [v[0] for v in resultinator.get_other_errors_by_organization().values()]
+
+        return Response(data={ 'successes': successes, 'errors': errors }, status=status.HTTP_200_OK)
         return Response('OK', status=status.HTTP_200_OK)
     # pylint: disable=broad-exception-caught
     except Exception as e:
diff --git a/ifxbilling b/ifxbilling
index 3a8575b2b..e8a11534f 160000
--- a/ifxbilling
+++ b/ifxbilling
@@ -1 +1 @@
-Subproject commit 3a8575b2ba26f1189a105e9b8b42ec0d199a8292
+Subproject commit e8a11534f22a0d05c08f7bf26c3d514ccccda29f
diff --git a/ifxurls b/ifxurls
index 3dd8a1e4c..60c0277f3 160000
--- a/ifxurls
+++ b/ifxurls
@@ -1 +1 @@
-Subproject commit 3dd8a1e4c47e55f54157fdb8c33c2162663aa789
+Subproject commit 60c0277f3663f02286c61009d4ba6207024abed1
diff --git a/ifxuser b/ifxuser
index 49b5ab520..24daba8b4 160000
--- a/ifxuser
+++ b/ifxuser
@@ -1 +1 @@
-Subproject commit 49b5ab52031d39441f3f638fde2ed1849d86a9c6
+Subproject commit 24daba8b46187a3a1266ca356ce39b39f458f398