diff --git a/Dockerfile b/Dockerfile
index 7991cf8..f7d35da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -41,6 +41,7 @@ COPY license.js /build/server/Common/sources/license.js
 COPY Makefile /build/server/Makefile
 COPY server.js /build/server/DocService/sources/server.js
 COPY constants.js /build/server/Common/srouces/constants.js
+COPY tenantManager.js /build/server/Common/srouces/tenantManager.js
 
 ## Build
 FROM path-stage as build-stage
diff --git a/tenantManager.js b/tenantManager.js
new file mode 100644
index 0000000..5c15103
--- /dev/null
+++ b/tenantManager.js
@@ -0,0 +1,163 @@
+*
+ * (c) Copyright Ascensio System SIA 2010-2019
+ *
+ * This program is a free software product. You can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License (AGPL)
+ * version 3 as published by the Free Software Foundation. In accordance with
+ * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
+ * that Ascensio System SIA expressly excludes the warranty of non-infringement
+ * of any third-party rights.
+ *
+ * This program is distributed WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
+ * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
+ *
+ * You can contact Ascensio System SIA at 20A-12 Ernesta Birznieka-Upisha
+ * street, Riga, Latvia, EU, LV-1050.
+ *
+ * The  interactive user interfaces in modified source and object code versions
+ * of the Program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU AGPL version 3.
+ *
+ * Pursuant to Section 7(b) of the License you must retain the original Product
+ * logo when distributing the program. Pursuant to Section 7(e) we decline to
+ * grant you any rights under trademark law for use of our trademarks.
+ *
+ * All the Product's GUI elements, including illustrations and icon sets, as
+ * well as technical writing content are licensed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International. See the License
+ * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
+ *
+ */
+
+'use strict';
+
+const config = require('config');
+const co = require('co');
+const NodeCache = require( "node-cache" );
+const license = require('./../../Common/sources/license');
+const constants = require('./../../Common/sources/constants');
+const commonDefines = require('./../../Common/sources/commondefines');
+const utils = require('./../../Common/sources/utils');
+const { readFile } = require('fs/promises');
+const path = require('path');
+
+const oPackageType = config.get('license.packageType');
+const cfgTenantsBaseDomain = config.get('tenants.baseDomain');
+const cfgTenantsBaseDir = config.get('tenants.baseDir');
+const cfgTenantsFilenameSecret = config.get('tenants.filenameSecret');
+const cfgTenantsFilenameLicense = config.get('tenants.filenameLicense');
+const cfgTenantsDefaultTenant = config.get('tenants.defaultTenant');
+const cfgTenantsCache = config.get('tenants.cache');
+const cfgSecretInbox = config.get('services.CoAuthoring.secret.inbox');
+const cfgSecretOutbox = config.get('services.CoAuthoring.secret.outbox');
+const cfgSecretSession = config.get('services.CoAuthoring.secret.session');
+
+let licenseInfo;
+let licenseOriginal;
+
+const nodeCache = new NodeCache(cfgTenantsCache);
+
+function getDefautTenant() {
+  return cfgTenantsDefaultTenant;
+}
+function getTenant(ctx, domain) {
+  let tenant = getDefautTenant();
+  if (domain) {
+    //remove port
+    domain = domain.replace(/\:.*$/, '');
+    tenant = domain;
+    if (cfgTenantsBaseDomain) {
+      let index = domain.indexOf('.' + cfgTenantsBaseDomain);
+      if (-1 !== index) {
+        tenant = domain.substring(0, index);
+      }
+    }
+  }
+  return tenant;
+}
+function getTenantByConnection(ctx, conn) {
+  return isMultitenantMode() ? getTenant(ctx, utils.getDomainByConnection(ctx, conn)) : getDefautTenant();
+}
+function getTenantByRequest(ctx, req) {
+  return isMultitenantMode() ? getTenant(ctx, utils.getDomainByRequest(ctx, req)) : getDefautTenant();
+}
+function getTenantPathPrefix(ctx) {
+  return isMultitenantMode() ? utils.removeIllegalCharacters(ctx.tenant) + '/' : '';
+}
+function getTenantSecret(ctx, type) {
+  return co(function*() {
+    let res = undefined;
+    if (isMultitenantMode()) {
+      let tenantPath = utils.removeIllegalCharacters(ctx.tenant);
+      let secretPath = path.join(cfgTenantsBaseDir, tenantPath, cfgTenantsFilenameSecret);
+      res = nodeCache.get(secretPath);
+      if (res) {
+        ctx.logger.debug('getTenantSecret from cache');
+      } else {
+        res = yield readFile(secretPath, {encoding: 'utf8'});
+        nodeCache.set(secretPath, res);
+        ctx.logger.debug('getTenantSecret from %s', secretPath);
+      }
+    } else {
+      switch (type) {
+        case commonDefines.c_oAscSecretType.Browser:
+        case commonDefines.c_oAscSecretType.Inbox:
+          res = utils.getSecretByElem(cfgSecretInbox);
+          break;
+        case commonDefines.c_oAscSecretType.Outbox:
+          res = utils.getSecretByElem(cfgSecretOutbox);
+          break;
+        case commonDefines.c_oAscSecretType.Session:
+          res = utils.getSecretByElem(cfgSecretSession);
+          break;
+      }
+    }
+    return res;
+  });
+}
+
+function setDefLicense(data, original) {
+  licenseInfo = data;
+  licenseOriginal = original;
+}
+function getTenantLicense(ctx) {
+  return co(function*() {
+    let res = {
+		count: 1,
+		type: c_LR.Success,
+		light: true,
+		packageType: constants.PACKAGE_TYPE_I,
+		mode: constants.LICENSE_MODE.None,
+		branding: true,
+		connections: constants.LICENSE_CONNECTIONS,
+		connectionsView: constants.LICENSE_CONNECTIONS,
+		customization: true,
+		advancedApi: true,
+		usersCount: constants.LICENSE_CONNECTIONS,
+		usersViewCount: constants.LICENSE_CONNECTIONS,
+		usersExpire: constants.LICENSE_EXPIRE_USERS_ONE_DAY,
+		hasLicense: true,
+		plugins: true,
+		buildDate: oBuildDate,
+		startDate: startDate,
+		endDate: new Date("2099-01-01T23:59:59.000Z"),
+		customerId: "",
+		alias: "community"
+	};
+    
+    return res;
+  });
+}
+function isMultitenantMode() {
+  return !!cfgTenantsBaseDir;
+}
+
+exports.getDefautTenant = getDefautTenant;
+exports.getTenantByConnection = getTenantByConnection;
+exports.getTenantByRequest = getTenantByRequest;
+exports.getTenantPathPrefix = getTenantPathPrefix;
+exports.getTenantSecret = getTenantSecret;
+exports.getTenantLicense = getTenantLicense;
+exports.setDefLicense = setDefLicense;
+exports.isMultitenantMode = isMultitenantMode;
\ No newline at end of file