Signature Management new Outlook Client

Hi mvz12,

I am sorry that the previous solution did not work for you. In that case, here's an alternative (HTML) approach to set an Outlook signature that should work for both the web and thick client:

1. Create the HTML signature: Create an HTML file containing the desired signature content using a text editor or an HTML editor. Save the file with the ".html" extension.

2. Upload the HTML signature to a web server or SharePoint: Host the HTML signature file on a web server or upload it to a SharePoint document library. Make sure the file is accessible via a URL.

3. Configure the signature settings in Exchange Online: In the Exchange Admin Center (EAC), go to "Mail flow" > "Rules" and create a new mail flow rule.

4. Set the signature using the HTML file: In the mail flow rule, configure the action to set the message header "X-MS-Exchange-Organization-Signature" and set the value to the URL of the HTML signature file.

5. Apply the mail flow rule to users or groups: Specify the users or groups to whom the mail flow rule should apply. This will ensure that the signature is added to outgoing messages for those users.

By using this method, the signature specified in the HTML file will be added to outgoing messages in both the web client and the thick client. 

I hope this alternative solution works for you. 

Kindest regards.