diff --git a/src/common/decorators/auth-guard.decorator.ts b/src/common/decorators/auth-guard.decorator.ts
index 944f15d..7d398fa 100755
--- a/src/common/decorators/auth-guard.decorator.ts
+++ b/src/common/decorators/auth-guard.decorator.ts
@@ -1,5 +1,5 @@
 import { UseGuards, applyDecorators } from "@nestjs/common";
-import { ApiBearerAuth } from "@nestjs/swagger";
+import { ApiBearerAuth, ApiHeader } from "@nestjs/swagger";
 
 import { AdminRouteGuard } from "../../modules/auth/guards/admin.guard";
 import { JwtAuthGuard } from "../../modules/auth/guards/auth.guard";
@@ -8,6 +8,6 @@ export function AuthGuards() {
   return applyDecorators(
     UseGuards(JwtAuthGuard, AdminRouteGuard),
     ApiBearerAuth("authorization"),
-    // ApiHeader({ name: "x-business-id", description: "Business ID" }),
+    ApiHeader({ name: "x-business-id", description: "Business ID" }),
   );
 }
diff --git a/src/common/enums/message.enum.ts b/src/common/enums/message.enum.ts
index 112c9c7..52e2a3d 100755
--- a/src/common/enums/message.enum.ts
+++ b/src/common/enums/message.enum.ts
@@ -422,6 +422,7 @@ export const enum BusinessMessage {
   QUOTA_PURCHASE_FAILED = "خرید حجم با خطا مواجه شد",
   PAYMENT_GATEWAY_ERROR = "خطا در اتصال به درگاه پرداخت",
   QUOTA_UPDATED = "حجم ایمیل با موفقیت به روز شد",
+  USER_DOES_NOT_HAVE_ACCESS_TO_SERVICE = "کاربر دسترسی به این سرویس را ندارد",
 }
 
 export const enum DomainMessage {
diff --git a/src/configs/swagger.config.ts b/src/configs/swagger.config.ts
index 9888beb..4d0ae9c 100755
--- a/src/configs/swagger.config.ts
+++ b/src/configs/swagger.config.ts
@@ -23,6 +23,9 @@ export function getSwaggerDocument(app: NestFastifyApplication) {
   SwaggerModule.setup("api-docs", app, swaggerDocument, {
     swaggerOptions: {
       persistAuthorization: true,
+      displayRequestDuration: true,
+      filter: true,
+      showExtensions: true,
     },
   });
 }
diff --git a/src/core/interceptors/business.interceptor.ts b/src/core/interceptors/business.interceptor.ts
index 0456abb..cac458c 100644
--- a/src/core/interceptors/business.interceptor.ts
+++ b/src/core/interceptors/business.interceptor.ts
@@ -1,4 +1,4 @@
-import { BadRequestException, CallHandler, ExecutionContext, ForbiddenException, Injectable, Logger, NestInterceptor } from "@nestjs/common";
+import { CallHandler, ExecutionContext, ForbiddenException, Injectable, NestInterceptor } from "@nestjs/common";
 import { FastifyRequest } from "fastify";
 import { Observable } from "rxjs";
 
@@ -15,7 +15,6 @@ declare module "fastify" {
 @Injectable()
 export class BusinessInterceptor implements NestInterceptor {
   private readonly headerName = "x-business-id";
-  private readonly logger = new Logger(BusinessInterceptor.name);
 
   constructor(private readonly businessesService: BusinessesService) {}
 
@@ -24,15 +23,16 @@ export class BusinessInterceptor implements NestInterceptor {
 
     const businessId = request.headers[this.headerName.toLocaleLowerCase()] as string;
 
-    if (businessId) {
-      try {
-        const business = await this.businessesService.getBusinessByDanakSubscriptionId(businessId);
+    const userId = request.user?.id;
 
-        request.business = business;
-      } catch (error) {
-        this.logger.error(error);
-        throw new BadRequestException(BusinessMessage.NOT_FOUND);
-      }
+    if (businessId) {
+      const business = await this.businessesService.getBusinessByDanakSubscriptionId(businessId);
+
+      const hasAccess = await this.businessesService.hasAccessToService(business, userId!);
+
+      if (!hasAccess) throw new ForbiddenException(BusinessMessage.USER_DOES_NOT_HAVE_ACCESS_TO_SERVICE);
+
+      request.business = business;
     } else {
       throw new ForbiddenException(BusinessMessage.BUSINESS_ID_REQUIRED);
     }
diff --git a/src/modules/businesses/constant/index.ts b/src/modules/businesses/constant/index.ts
index c398437..4f2eafe 100644
--- a/src/modules/businesses/constant/index.ts
+++ b/src/modules/businesses/constant/index.ts
@@ -5,7 +5,7 @@ export const SUBSCRIPTIONS = Object.freeze({
 
   //
   SERVICE_SLUG: "Dmail",
-  SERVICE_ID: "e51afdc3-ea0b-49cf-8f49-2a6f131b024e",
+  DMAIL_SERVICE_ID: "e51afdc3-ea0b-49cf-8f49-2a6f131b024e",
 });
 
 export const QUOTA_CONSTANTS = Object.freeze({
diff --git a/src/modules/businesses/entities/business.entity.ts b/src/modules/businesses/entities/business.entity.ts
index e8c9763..f875b47 100644
--- a/src/modules/businesses/entities/business.entity.ts
+++ b/src/modules/businesses/entities/business.entity.ts
@@ -22,13 +22,13 @@ export class Business extends BaseEntity {
   @Property({ type: "varchar", length: 255, nullable: true })
   logoUrl?: string;
 
-  @Property({ type: "bigint", default: 1_073_741_824 }) // 1GB default
+  @Property({ type: "bigint", default: 10_737_418_240 }) // 10GB default
   quota!: number;
 
   @Property({ type: "bigint", default: 0 })
   usedQuota!: number & Opt;
 
-  @Property({ type: "bigint", default: 1_073_741_824 })
+  @Property({ type: "bigint", default: 10_737_418_240 })
   remainingQuota!: number & Opt;
 
   //=========================
diff --git a/src/modules/businesses/interfaces/IBusiness.ts b/src/modules/businesses/interfaces/IBusiness.ts
index 9e43106..e64eab4 100644
--- a/src/modules/businesses/interfaces/IBusiness.ts
+++ b/src/modules/businesses/interfaces/IBusiness.ts
@@ -19,6 +19,15 @@ export enum InvoiceStatus {
   OVERDUE = "OVERDUE",
 }
 
+export interface IDanakCheckAccessResponse {
+  statusCode: number;
+  success: boolean;
+  data?: {
+    hasAccess: boolean;
+  };
+  error?: string;
+}
+
 export interface IExternalInvoiceJob {
   invoice: {
     id: string;
diff --git a/src/modules/businesses/interfaces/IQuotaPurchase.ts b/src/modules/businesses/interfaces/IQuotaPurchase.ts
index 15e1dd2..b1ac47a 100644
--- a/src/modules/businesses/interfaces/IQuotaPurchase.ts
+++ b/src/modules/businesses/interfaces/IQuotaPurchase.ts
@@ -14,6 +14,7 @@ export interface IDanakCorpQuotaPurchaseRequest {
 }
 
 export interface IDanakCorpQuotaPurchaseResponse {
+  statusCode: number;
   success: boolean;
   data?: {
     invoice: {
diff --git a/src/modules/businesses/queue/business-provisioning.processor.ts b/src/modules/businesses/queue/business-provisioning.processor.ts
index 3627fed..15983b9 100644
--- a/src/modules/businesses/queue/business-provisioning.processor.ts
+++ b/src/modules/businesses/queue/business-provisioning.processor.ts
@@ -33,7 +33,7 @@ export class BusinessProvisioningProcessor extends WorkerProcessor {
     const { subscriptionId, serviceId, serviceName, businessName, slug, userId, fullName, phone, email } = job.data;
 
     // Only act if the event is for this service
-    if (serviceId !== SUBSCRIPTIONS.SERVICE_ID) {
+    if (serviceId !== SUBSCRIPTIONS.DMAIL_SERVICE_ID) {
       this.logger.debug(`Skipping job for service: ${serviceName}`);
       return;
     }
diff --git a/src/modules/businesses/services/businesses.service.ts b/src/modules/businesses/services/businesses.service.ts
index 51935da..f1b3db5 100644
--- a/src/modules/businesses/services/businesses.service.ts
+++ b/src/modules/businesses/services/businesses.service.ts
@@ -1,18 +1,27 @@
 import { EntityManager } from "@mikro-orm/postgresql";
-import { BadRequestException, Injectable } from "@nestjs/common";
+import { HttpService } from "@nestjs/axios";
+import { BadRequestException, Inject, Injectable, InternalServerErrorException, Logger } from "@nestjs/common";
+import { AxiosError } from "axios";
+import { catchError, firstValueFrom } from "rxjs";
 
 import { QuotaPurchaseService } from "./quota-purchase.service";
 import { BusinessMessage } from "../../../common/enums/message.enum";
-import { QUOTA_CONSTANTS } from "../constant";
+import { DANAKCORP_CONFIG, IDanakCorpConfig } from "../../../configs/danakcorp.config";
+import { QUOTA_CONSTANTS, SUBSCRIPTIONS } from "../constant";
 import { PurchaseQuotaDto } from "../DTO/purchase-quota.dto";
 import { UpdateBusinessSettingsDto } from "../DTO/update-business-settings.dto";
 import { BusinessStaff } from "../entities/business-staff.entity";
+import { Business } from "../entities/business.entity";
+import { IDanakCheckAccessResponse } from "../interfaces/IBusiness";
 import { BusinessRepository } from "../repositories/business.repository";
 
 @Injectable()
 export class BusinessesService {
+  private readonly logger = new Logger(BusinessesService.name);
   constructor(
     private readonly businessRepository: BusinessRepository,
+    @Inject(DANAKCORP_CONFIG) private readonly danakCorpConfig: IDanakCorpConfig,
+    private readonly httpService: HttpService,
     private readonly em: EntityManager,
     private readonly quotaPurchaseService: QuotaPurchaseService,
   ) {}
@@ -23,6 +32,41 @@ export class BusinessesService {
 
     return business;
   }
+
+  //************************************************** */
+  async hasAccessToService(business: Business, userId: string) {
+    try {
+      const { data } = await firstValueFrom(
+        this.httpService
+          .get<IDanakCheckAccessResponse>(`${this.danakCorpConfig.apiUrl}/subscriptions/check-access/${SUBSCRIPTIONS.DMAIL_SERVICE_ID}`, {
+            params: {
+              userId,
+              danakSubscriptionId: business.danakSubscriptionId,
+            },
+            headers: {
+              "X-API-Key": this.danakCorpConfig.apiKey,
+            },
+            timeout: this.danakCorpConfig.timeout,
+          })
+          .pipe(
+            catchError((error: AxiosError) => {
+              this.logger.error(`Failed to check access to service for business ${business.id}:`, error.message);
+              throw new InternalServerErrorException(BusinessMessage.USER_DOES_NOT_HAVE_ACCESS_TO_SERVICE);
+            }),
+          ),
+      );
+
+      if (!data.success || !data.data?.hasAccess) {
+        this.logger.error(`DanakCorp API returned error for business ${business.id}:`, data.error);
+        throw new InternalServerErrorException(BusinessMessage.QUOTA_PURCHASE_FAILED);
+      }
+
+      return data.data?.hasAccess;
+    } catch (error) {
+      this.logger.error(`Failed to check access to service for business ${business.id}:`, error);
+      throw new InternalServerErrorException(BusinessMessage.USER_DOES_NOT_HAVE_ACCESS_TO_SERVICE);
+    }
+  }
   //************************************************** */
 
   async getBusinessBySlug(slug: string) {
@@ -48,7 +92,6 @@ export class BusinessesService {
 
   async getBusinessSettings(businessId: string) {
     const business = await this.businessRepository.findOne({ id: businessId, deletedAt: null });
-    console.log("business", business);
     if (!business) throw new BadRequestException(BusinessMessage.NOT_FOUND);
 
     return { business };