combine the 2 articles

Author: lucciz01

.openpublishing.redirection.json

@@ -12879,6 +12879,10 @@
     {
       "source_path": "support/power-platform/dataverse/d365-app-outlook/error-when-installing-crm-2016-outlook.md",
       "redirect_url": "/previous-versions/troubleshoot/dynamics/crm/error-when-installing-crm-2016-outlook"
+    },
+    {
+      "source_path": "support/power-platform/dataverse/d365-app-outlook/error-incomingemailrejected-install-dynamics-365-app-outlook.md",
+      "redirect_url": "/troubleshoot/power-platform/dataverse/d365-app-outlook/error-install-dynamics-365-app-outlook"
     }
   ]
 }

support/power-platform/dataverse/d365-app-outlook/error-incomingemailrejected-install-dynamics-365-app-outlook.md

@@ -1,35 +1,67 @@
 ---
-title: IncomingEmailS2SApprovalNeeded when you install Dynamics 365 App for Outlook
-description: This article provides a resolution for the problem that occurs when you attempt to install Dynamics 365 App for Outlook, the Status column shows Issue when adding to Outlook.
+title: IncomingEmailS2SApprovalNeeded or IncomingEmailRejected when installing Dynamics 365 App for Outlook
+description: Solves the errors that occur when you try to install Microsoft Dynamics 365 App for Outlook.
 ms.reviewer: 
 ms.date: 02/28/2025
 ms.custom: sap:Dynamics 365 App for Outlook Add-In
 ---
-# IncomingEmailS2SApprovalNeeded error when attempting to install Dynamics 365 App for Outlook
+# IncomingEmailS2SApprovalNeeded or IncomingEmailRejected error when you install Dynamics 365 App for Outlook
 
-This article helps you resolve the problem that occurs when you attempt to install Dynamics 365 App for Outlook, the Status column shows **Issue when adding to Outlook**.
+This article helps you resolve the errors that might occur when you try to install Microsoft Dynamics 365 App for Outlook.
 
 _Applies to:_   Dynamics 365 App for Outlook  
-_Original KB number:_   3211621  
+_Original KB number:_   3211621, 3211627  
 
-## Symptoms
+## Error - IncomingEmailS2SApprovalNeeded
 
-When you attempt to install Dynamics 365 App for Outlook, the Status column shows **Issue when adding to Outlook**. When you click the **Learn more** link, you see a dialog with the following details:
+When you try to [install Dynamics 365 App for Outlook](/dynamics365/outlook-app/deploy-dynamics-365-app-for-outlook), the **Status** column shows **Issue when adding to Outlook**. When you select the **Learn more** link, you see a dialog with the following details:
 
 > There was an issue when attempting to add the app to Outlook.  
-Crm : IncomingEmailS2SApprovalNeeded
+> Crm : IncomingEmailS2SApprovalNeeded
 
-## Cause
+### Cause
 
-This error can occur if the Mailbox record has not been approved by an Office 365 Global Administrator.
+This error can occur if the mailbox record isn't approved by a Microsoft 365 Global Administrator.
 
-## Resolution
+### Resolution
 
-Approve the Mailbox record as a user with the Global Administrator role in Office 365.
+To solve this issue, approve the mailbox record as a user with the Global Administrator role in Microsoft 365.
 
-1. Sign in to Dynamics 365 as a user with the Global Administrator role in Office 365.
-2. Click **Settings** and then click **Email Configuration**.
-3. Within the **Email Configuration** area, click **Mailboxes** and then change the view from **My Active Mailboxes** to **Active Mailboxes**.
-4. Select the Mailbox record that encountered the error and then click **Approve Email**.
-5. After the email address has been approved, click the **Test & Enable Mailboxes** button.
-6. After the mailbox has completed testing, attempt to install Dynamics 365 App for Outlook again. This can be located by clicking **Settings** and then clicking Dynamics 365 App for Outlook.
+1. Sign in to Dynamics 365 as a user with the Global Administrator role in Microsoft 365.
+2. Select **Settings** > **Email Configuration**.
+
+3. Within the **Email Configuration** area, select **Mailboxes** and then change the view from **My Active Mailboxes** to **Active Mailboxes**.
+
+4. Select the mailbox record that encountered the error and then select **Approve Email**.
+5. After the email address is approved, select the **Test & Enable Mailboxes** button.
+
+6. After the mailbox has completed testing, try to install Dynamics 365 App for Outlook again. This can be located by selecting **Settings** and then selecting **Dynamics 365 App for Outlook**.
+
+## Error - IncomingEmailRejected
+
+When you try to install Dynamics 365 App for Outlook, the **Status** column shows **Issue when adding to Outlook**. When you select the **Learn more** link, you see a dialog with the following details:
+
+> There was an issue when attempting to add the app to Outlook.  
+> Crm : IncomingEmailRejected
+
+### Cause
+
+This error can occur due to one of the following reasons:
+
+- The email address for the mailbox record in Dynamics 365 isn't approved.
+- The Exchange mailbox is currently linked to another Dynamics 365 organization. An Exchange mailbox (email address) can only synchronize appointments, contacts, and tasks with one organization, and a user that belongs to that organization can only synchronize appointments, contacts, and tasks with one Exchange mailbox.
+
+### Resolution
+
+Verify the email address for the mailbox is approved and associated with the desired Dynamics 365 organization.
+
+1. Sign in to Dynamics 365 as a user with the System Administrator role.
+2. Select **Settings** > **Email Configuration**.
+
+3. Within the **Email Configuration** area, select **Mailboxes** and then change the view from **My Active Mailboxes** to **Active Mailboxes**.
+4. Select the mailbox record that encountered the error and then select **Approve Email**.
+5. After the email address is approved, select the **Test & Enable Mailboxes** button.
+
+6. Within the **Test Email Configuration** dialog, make sure to select the [Sync items with Exchange from this Dynamics 365 Organization only, even if Exchange was set to sync with a different org](/dynamics365/customerengagement/on-premises/admin/when-would-want-use-check-box) checkbox and then select **OK**.
+
+7. After the mailbox has completed testing, try to install Dynamics 365 App for Outlook again. This can be located by selecting **Settings** and then selecting **Dynamics 365 App for Outlook**.

support/power-platform/dataverse/d365-app-outlook/error-install-dynamics-365-app-outlook.md

@@ -46,9 +46,7 @@
       href: d365-app-outlook/errors-when-opening-365-app-outlook.md
     - name: Experience without Server-Side Synchronization
       href: d365-app-outlook/experience-without-server-side-synchronization.md
-    - name: IncomingEmailRejected error when installing App for Outlook
-      href: d365-app-outlook/error-incomingemailrejected-install-dynamics-365-app-outlook.md
-    - name: IncomingEmailS2SApprovalNeeded error when installing App for Outlook
+    - name: IncomingEmailS2SApprovalNeeded or IncomingEmailRejected error during installation
       href: d365-app-outlook/error-install-dynamics-365-app-outlook.md
     - name: Item level Server-Side Synchronization issues
       href: d365-app-outlook/troubleshoot-item-level-server-side-synchronization-issues.md