Using the Exclaimer Outlook Add-in

To use the Exclaimer Outlook Add-in (Outlook Web):

1. Log in to your Outlook Web App.
    

2. Select New message to compose a new email. The signature currently set to Default is automatically applied to all new emails. For more information on setting signatures as default, see How to apply a Client-Side signature to a forward or reply message.  

   WARNING! If the email is opened in a pop-up window before the Add-in has applied the signature, the default client-side signature will not be inserted. This is due to a limitation in Outlook.
3. If sending as an alias address, change the address in the From field. The relevant signature is applied automatically.
    

4. If you have configured Signature Recipient Rules, enter the recipient address in the To field. The relevant signature is applied automatically. For more information on configuring Recipient Rules for Client-Side deployment, see Apply Recipient Settings Client-Side.

   NOTE: Recipient Rules are available on Standard and Pro plans only. For more information on pricing plans, see Exclaimer pricing plans.
5. To manually add a signature to your email, select the Exclaimer icon .
   Depending on your installation, the Exclaimer icon can be found on the bottom toolbar or on the menu ribbon. It may be located within the ellipsis menus. If prompted, sign in to your Microsoft 365 account.
   
   
   _{The Exclaimer icon may be in the bottom toolbar, menu ribbon, or ellipsis menus, depending on your installation.}
   
   This opens the signatures pane, displaying all available signatures. The icons above each signature represent whether a signature is set as a Default: a pencil icon is a Default for new emails, and an arrow icon is a Default for replied or forwarded emails. If a signature has been set as a Default, the appropriate icon is highlighted.
   
   
   _{An example of signatures displayed in the pane.}
    
6. Select a signature to add to your email. The selected signature is instantly displayed in the message area.
   
   
   _{An example of a signature applied to an email.}

To use the Exclaimer Outlook Add-in (Outlook Desktop):

1. Log in to your Outlook Desktop App.
    

2. Select New Email to compose a new email. The signature currently set to Default is automatically applied to all new emails. For more information on setting signatures as default, see How to apply a Client-Side signature to a forward or reply message.
    

   WARNING! If the email is opened in a pop-up window before the Add-in has applied the signature, the default client-side signature will not be inserted. This is due to a limitation in Outlook.
3. If sending as an alias address, change the address in the From field. The relevant signature is applied automatically.
    

4. If you have configured Signature Recipient Rules, enter the recipient address in the To field. The relevant signature is applied automatically. For more information on configuring Recipient Rules for Client-Side deployment, see Apply Recipient Settings Client-Side.

   NOTE: Recipient Rules are available on Standard and Pro plans only. For more information on pricing plans, see Exclaimer pricing plans. If the client-side signature is not appearing in the Add-in, ensure the Apply this signature after any existing Client-Side Signatures option is not selected in Signatures Advanced Rules.
5. To add a signature manually, within the Message ribbon, select Exclaimer. Sign in to your Microsoft 365 account if prompted.
   
   
   _{Select the Exclaimer button.}
   
   This opens the signatures pane, displaying all available signatures. The icons above each signature represent whether a signature is set as a Default: a pencil icon is a Default for new emails, and an arrow icon is a Default for replied or forwarded emails. If a signature has been set as a Default, the appropriate icon is highlighted.
    
6. Select a signature to use in the email. The signature appears in the message area.
   
   
   _{An example of a signature applied to an email.}

To use the Exclaimer Outlook Add-in on mobile devices:

1. Log in to your Outlook app.
    

2. Tap to open a new email. The signature currently set to default is automatically applied to all new emails. For more information on setting signatures as default, see How to apply a Client-Side signature to a forward or reply message.
   
          
   _{Examples of a signature applied to an email on Android and iOS.}

   NOTES: 
   • Manually selecting a signature is not supported on mobile devices. 
   • Email signatures are not applied when using Quick Reply in Outlook Mobile.

For troubleshooting help, see the Troubleshooting section of our interactive guide.

If you need to raise a support ticket, run our diagnostic PowerShell script to help the Support team check your Outlook and Exclaimer Add-In setup. The script safely collects technical details, such as Outlook version, Add-In status, and connectivity, without accessing personal data or emails, enabling faster troubleshooting.
 

 To run the script:

1. Launch Windows PowerShell. Administrator privileges are optional but recommended.
    

2. Enter the following command: 

    

   Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass; Invoke-WebRequest -Uri "https://raw.githubusercontent.com/exclaimerltd/Internal-Support-Scripts/master/AddInChecks.ps1" -OutFile "$env:TEMP\AddInChecks.ps1"; & "$env:TEMP\AddInChecks.ps1" 
     
3. Follow the on-screen prompts.
    

4. When complete, a report named AddInChecks.html will be generated.

   NOTE: Report Location:
   By default: C:\Users\<YourUser>\Downloads\AddInChecks.html
   Fallback (if Downloads is unavailable): C:\Temp\AddInChecks.html
    

   Attach the generated file to your Support ticket to allow the Support team to review your configuration.