Outlook signature changes appearance after clicking on "Open in new window"

[ivanosevitch]

After inserting a signature, clicking on "open in new window" will make some table rows in the signature higher than what they actually are. The signature will thus not look the same.

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: PC Desktop
• Host [Excel, Word, PowerPoint, etc.]: New Outlook Desktop and web
• Office version number:
  
• Operating System: Windows 11
• Browser (if using Office on the web): Edge

Expected behavior

Signature is rendered in the same fashion than before clicking on "open in new window", that is like this:

Current behavior

Outlook adds a inline style of height: 47px; to the first td element (containing "Hello Hello Hello") after the email is opened in a new window. This height is both unneeded and too high. This leads to the signature looking differently than the "expected behavior", with a space too big between the first row ("Hello") and the second row (Microsoft link):

Steps to reproduce

const sig = `<table>
    <tbody>
        <tr>
            <td style="width: 448px;">
                <p><span>Hello Hello Hello</span></p>
            </td>
        </tr>
        <tr>
            <td>
                <p><a href="https://microsoft.com" target="_blank">microsoft.com</a></p>
            </td>
        </tr>
    </tbody>
</table>`;

Office.context.mailbox.item.body.setSignatureAsync(
  sig,
  {
    coercionType: "html",
  },
  function (asyncResult) {
    console.info("Done");
  }
);

2. Create a new mail
3. Wait for the signature to be inserted, but don't write anything in the mail body
4. Click on "open in new window"

IMPORTANT NOTE: I can only reproduce this bug about one time out of 2. Please try several times to reproduce.

Context

We are developing a signature addin. Clients are complaining that their signatures doesn't look the same before and after clicking on "Open in a new window".

[megharai1302]

Thanks for reporting the issue, we are looking at it as a workaround can you try-
Modifying Signature HTML: Adjust the HTML of the signature to set the height of the td elements to auto attribute.

Hello Hello Hello

[ivanosevitch]

As a workaround can you try- Modifying Signature HTML: Adjust the HTML of the signature to set the height of the td elements to auto attribute.

Thanks for the prompt answer :) I confirm that height: auto works as a workaround.