diff --git a/src/services/slack.js b/src/services/slack.js
index 83e4907..47cebfe 100644
--- a/src/services/slack.js
+++ b/src/services/slack.js
@@ -53,8 +53,8 @@ async function deleteSlackInstallation(slack) {
     return slack.deleteOne();
 }
 
-export async function getSlackOrError(where) {
-    const slack = await getSlack(where);
+export async function getSlackOrError(where, newInstallation = false) {
+    const slack = await getSlack(where, newInstallation);
 
     if (!slack) {
         throw new NotFoundError('Slack installation not found');
@@ -63,7 +63,7 @@ export async function getSlackOrError(where) {
     return slack;
 }
 
-export async function getSlack(where) {
+export async function getSlack(where, newInstallation = false) {
     if (!isQueryValid(where)) {
         throw new NotFoundError('Slack installation not found - no valid query provided');
     }
@@ -73,6 +73,7 @@ export async function getSlack(where) {
     if (where.id) query.where('_id', where.id);
     if (where.team_id) query.where('team_id', where.team_id);
     if (where.enterprise_id) query.where('enterprise_id', where.enterprise_id);
+    if (newInstallation) query.where('domain', null);
 
     return query.exec();
 }
@@ -80,16 +81,13 @@ export async function getSlack(where) {
 export async function createSlackInstallation(args) {
     await checkSlackIntegration(args.team_id);
 
-    // Remove old installation
-    await deleteSlack(args.enterprise_id, args.team_id);
-
     // Create new slack instance
     let slackInstallation = new Slack({...args});
     return slackInstallation.save();
 }
 
 export async function authorizeSlackInstallation(domain, team_id, admin) {
-    const slack = await getSlackOrError({ team_id });
+    const slack = await getSlackOrError({ team_id }, true);
     const _domain = await getDomainById(domain);
 
     if (String(_domain.owner) != String(admin._id)) {
diff --git a/tests/slack.test.js b/tests/slack.test.js
index 068ef82..1c0aae5 100644
--- a/tests/slack.test.js
+++ b/tests/slack.test.js
@@ -17,8 +17,10 @@ import {
     domainId,
     config1Document,
     groupConfigDocument,
-    adminAccountToken
+    adminAccountToken,
+    adminMasterAccountId
 } from './fixtures/db_api';
+import Domain from '../src/models/domain';
 
 afterAll(async () => {
     await Slack.deleteMany().exec();
@@ -44,6 +46,20 @@ const buildInstallation = async (team_id, domain) => {
     return installation;
 };
 
+const createDomain = async (name) => {
+    const _id = new mongoose.Types.ObjectId();
+    const domainDocument = {
+        _id,
+        name,
+        description: 'Test Domain for Slack Integration',
+        activated: new Map().set(EnvType.DEFAULT, true),
+        owner: adminMasterAccountId
+    };
+
+    await new Domain(domainDocument).save();
+    return _id;
+};
+
 describe('Slack Installation', () => {
     beforeAll(setupDatabase);
 
@@ -386,6 +402,42 @@ describe('Slack Installation', () => {
         expect(slackDb).toBe(null);
     });
 
+    test('SLACK_SUITE - Should unlink single installation from Multi Slack Installation', async () => {
+        //given - installation/authorization for Domain 1
+        const installation = await buildInstallation('MULTI_DOMAIN_TEAM_ID', null);
+        await request(app)
+            .post('/slack/v1/authorize')
+            .set('Authorization', `Bearer ${adminMasterAccountToken}`)
+            .send({
+                domain: domainId,
+                team_id: installation.team_id
+            }).expect(200);
+
+        //given - installation/authorization for Domain 2
+        const domainId2 = await createDomain('Domain 2');
+        const installation2 = await buildInstallation('MULTI_DOMAIN_TEAM_ID', null);
+        await request(app)
+            .post('/slack/v1/authorize')
+            .set('Authorization', `Bearer ${adminMasterAccountToken}`)
+            .send({
+                domain: domainId2,
+                team_id: installation2.team_id
+            }).expect(200);
+
+        //test - unlink installation for Domain 1 without affecting Domain 2
+        await request(app)
+            .delete(`/slack/v1/installation/unlink?domain=${String(domainId)}`)
+            .set('Authorization', `Bearer ${adminMasterAccountToken}`)
+            .send().expect(200);
+
+        //check DB
+        const domain = await getDomainById(domainId);
+        expect(domain.integrations.slack).toBe(null);
+
+        const domain2 = await getDomainById(domainId2);
+        expect(domain2.integrations.slack).not.toBe(null);
+    });
+
     test('SLACK_SUITE - Should NOT unlink installation - Admin is not owner', async () => {
         const response = await request(app)
             .delete(`/slack/v1/installation/unlink?domain=${String(domainId)}`)