Fixed naming in subscription update models.

src/Core/AdminConsole/OrganizationFeatures/OrganizationUsers/InviteUsers/Validation/PasswordManager/PasswordManagerSubscriptionUpdate.cs

@@ -7,7 +7,7 @@ namespace Bit.Core.AdminConsole.OrganizationFeatures.OrganizationUsers.InviteUse
 public class PasswordManagerSubscriptionUpdate
 {
     /// <summary>
-    /// Seats the organization is currently paying for
+    /// Seats the organization has
     /// </summary>
     public int? Seats { get; }
 

src/Core/AdminConsole/OrganizationFeatures/OrganizationUsers/InviteUsers/Validation/SecretsManager/SecretsManagerInviteUserValidation.cs

@@ -8,11 +8,11 @@ public static class SecretsManagerInviteUserValidation
         SecretsManagerSubscriptionUpdate subscriptionUpdate) =>
         subscriptionUpdate switch
         {
-            { UseSecretsManger: false, AdditionalSeats: > 0 } =>
+            { UseSecretsManger: false, NewUsersToAdd: > 0 } =>
                 new Invalid<SecretsManagerSubscriptionUpdate>(
                     new OrganizationNoSecretsManagerError(subscriptionUpdate)),
 
-            { UseSecretsManger: false, AdditionalSeats: 0 } or { UseSecretsManger: true, Seats: null } =>
+            { UseSecretsManger: false, NewUsersToAdd: 0 } or { UseSecretsManger: true, Seats: null } =>
                 new Valid<SecretsManagerSubscriptionUpdate>(subscriptionUpdate),
 
             { UseSecretsManger: true, SecretsManagerPlan.HasAdditionalSeatsOption: false } =>
@@ -20,7 +20,7 @@ public static class SecretsManagerInviteUserValidation
                     new SecretsManagerAdditionalSeatLimitReachedError(subscriptionUpdate)),
 
             { UseSecretsManger: true, SecretsManagerPlan.MaxAdditionalSeats: var planMaxSeats }
-                when planMaxSeats < subscriptionUpdate.AdditionalSeats =>
+                when planMaxSeats < subscriptionUpdate.NewUsersToAdd =>
                 new Invalid<SecretsManagerSubscriptionUpdate>(
                     new SecretsManagerAdditionalSeatLimitReachedError(subscriptionUpdate)),
 

src/Core/AdminConsole/OrganizationFeatures/OrganizationUsers/InviteUsers/Validation/SecretsManager/SecretsManagerSubscriptionUpdate.cs

@@ -8,14 +8,45 @@ namespace Bit.Core.AdminConsole.OrganizationFeatures.OrganizationUsers.InviteUse
 public class SecretsManagerSubscriptionUpdate
 {
     public bool UseSecretsManger { get; }
+
+    /// <summary>
+    /// Seats the organization has
+    /// </summary>
     public int? Seats { get; }
+
+    /// <summary>
+    /// Max number of seats that the organization can have
+    /// </summary>
     public int? MaxAutoScaleSeats { get; }
+
+    /// <summary>
+    /// Seats currently occupied by current users
+    /// </summary>
     public int OccupiedSeats { get; }
-    public int AdditionalSeats { get; }
+
+    /// <summary>
+    /// Users to add to the organization seats
+    /// </summary>
+    public int NewUsersToAdd { get; }
+
     public int? PasswordManagerUpdatedSeatTotal { get; }
     public Plan.SecretsManagerPlanFeatures SecretsManagerPlan { get; }
+
+    /// <summary>
+    /// Number of seats available for users
+    /// </summary>
     public int? AvailableSeats => Seats - OccupiedSeats;
-    public int SeatsRequiredToAdd => AdditionalSeats - AvailableSeats ?? 0;
+
+    /// <summary>
+    /// Number of seats to scale the organization to.
+    ///
+    /// If Organization has no seat limit (Seats is null), then there are no new seats to add.
+    /// </summary>
+    public int SeatsRequiredToAdd => AvailableSeats.HasValue ? Math.Max(NewUsersToAdd - AvailableSeats.Value, 0) : 0;
+
+    /// <summary>
+    /// New total of seats for the organization
+    /// </summary>
     public int? UpdatedSeatTotal => Seats + SeatsRequiredToAdd;
 
     private SecretsManagerSubscriptionUpdate(bool useSecretsManger,
@@ -30,7 +61,7 @@ public class SecretsManagerSubscriptionUpdate
         Seats = organizationSeats;
         MaxAutoScaleSeats = organizationAutoScaleSeatLimit;
         OccupiedSeats = currentSeats;
-        AdditionalSeats = seatsToAdd;
+        NewUsersToAdd = seatsToAdd;
         PasswordManagerUpdatedSeatTotal = passwordManagerUpdatedSeatTotal;
         SecretsManagerPlan = plan;
     }