Problems with email signatures in Microsoft 365

Problems with email signatures in Office 365

In Microsoft 365 (or Office 365, if you like the old name better), there are some situations in which your email signatures stop working. Use the table of contents for a quick access list of the most frequent email signature management problems, with solutions.

Broken email signature formatting

While the problem is not reserved for Microsoft 365, it happens a lot on this platform.

You create a beautiful email signature in Outlook and then, after you send an email with the signature included, it is not right. The layout is different, line breaks appear out of nowhere, fonts don’t look like what you’ve set up and so on. Sounds familiar? Then you’ve got an HTML problem. The most common reason for that is creating your email signature in Microsoft Word. While it looks all right in Word and in your signature settings, it has a lot of hidden formatting information that usually breaks the layout right after you send an email.

The solution is to build your email signature with the proper HTML code. If you are an HTML expert, you can use those pro tips to build a well-formatted signature. If, like most of humanity, you only have some distant clue as to what HTML is, you can use the free email signature generator. That’s how anyone can get a great looking signature that doesn’t break as soon as you send out your email.

Email signature breaks after pasting it in signature settings

You create a professional, well-formatted HTML email signature. But right after you paste it into your signature settings, all fonts change to your client’s default one, images are resized and white space gets all messed up.

This problem occurs in every new Outlook for Windows. It’s also a rare occurrence in Outlook on the web (OWA). No matter where you copy the email signature from, after you paste it into signature settings, the signature gets destroyed. The issue happens because the signature settings don’t have the option to “keep source formatting”. Fortunately, I’ve found a workaround that isn’t obvious, but fixes the issue.

To solve the problem, instead of copying & pasting, you can drag & drop the HTML email signature to keep its formatting. Here’s the easiest way to do this:

  1. Create the email signature using our free email signature generator.
  2. Change the platform to New Outlook.
  3. Open your signature settings side by side with the generator.
  4. In the generator, click Apply your signature > Generate > Select signature. Drag & drop the signature from the generator to the signature settings.
  5. Add a signature’s name and save your settings.

Email signatures are missing

You had 30 different email signature designs set up and suddenly they’re all gone? Or, you had different email signatures set up across your devices and now they’re all the same?

The most likely reason for this phenomenon is the feature called “signature cloud settings” (or “roaming signatures”) added by Microsoft. With its implementation, the location of Outlook email signatures changed from your local Windows folder to mailbox settings in the cloud. The feature is meant to make your life easier – you no longer need to set up email signatures in each Outlook you use. The catch is that it might mistakenly overwrite the signatures you set up previously.

To fix the issue, you can disable the roaming signatures feature, which will automatically restore your missing signatures. Alternatively, you can also try to recreate your missing signatures by going to the local Outlook signature storage and copying the contents of HTML or RTF signature files. Learn more

Double email signatures in Microsoft 365

The problem of double email signatures shocked many and for a good reason: on the first look, it doesn’t make any sense. Here’s how it goes:

You send out an email with your signature. Everything seems fine until you get a reply in which you have two email signatures under your message. One of the signatures you know. The other has your personal data but looks completely different. What’s more, when you check your Sent Items folder, there’s only one email signature.

It might come as a surprise, but the issue is quite common and is not a prank. The second signature is usually added by your organization after an email is sent. Most well-known brands have policies that control how the brand is presented across different channels, email included. They use “mail flow rules” or dedicated tools to add a specific signature after an email is sent, so that it cannot be changed by end users. A side effect? Double signatures if end users aren’t aware of such mechanism.

The problem is probably not your fault – your organization should always communicate the use of such methods clearly, or use branding management tools that let users see the organization-issued signatures.

Microsoft 365 signatures cannot be edited

Sometimes, when using your Microsoft 365 Outlook on the web (OWA), you might experience a problem when trying to set an email signature for your account. When going through email settings, under Layout menu, the Signature button might be missing. This makes it impossible for users to make any changes to their Microsoft 365 email signatures. The most probable cause is OWA policy blocking this feature. Here is how to fix it:

  1. Access your Exchange admin center and go to Roles > Outlook web app policies. Choose the policy which is in action (OwaMailboxPolicy-Default in this example) and edit it.
Exchange admin center - OWA policy
  1. In the Features section, click Manage features.
Problems with email signatures in Microsoft 365 - manage OWA policy features
  1. Under the User experience section, select the Email signature checkbox.
Email signatures in OWA policy

Note:

  • This feature can be used the other way round in case there is an email signature/disclaimer added through mail flow rules or a third-party tool, and you want to block user-made signatures.
  • If an email signature is added prior to blocking this feature, users will still be able to use it. It can even be added automatically if such an option has been chosen.
  • OWA policies, as expected, are not applied to users who access their mailboxes in Outlook.

If you are not sure how to set an Microsoft 365 email signature, this article may come in handy.

No images in Microsoft 365 email signatures

office 365 email signatures not working no image

Have you added an image to your email signature, but it is not displayed? Have you struggled with the dreaded red x showing instead of your marketing banners or social media icons? This might have happened because you had used a linked image (aka hosted image). Linked images are blocked automatically by most email clients, so your recipients need to voluntarily click the option to show images or add you to their safe senders’ list. However, it won’t fix the problem if the web location where the image is stored becomes unavailable or when recipients browse emails in offline mode. You can fix this issue by using embedded graphics instead:

  1. Click the picture icon in the signature editor window and choose a picture from your local drive.
Outlook on the web - how to embed an image

Note:

  • Images in this option are sent as hidden attachments, increasing the email size.
  • On rare occasions, such images can be deleted by the recipient’s anti-virus software.
  • If you want to ensure your embedded images look correctly on the recipient’s side, you have to use a third-party solution like CodeTwo Email Signatures 365.

You can read more on the differences between linked and embedded (inline) pictures in this blog post.

Images don’t appear even after clicking “show images”

There’s a huge difference between using hosted and embedded images in email signatures. The fix from the previous problem will not always be available since not all email clients support embedded images. And hosted images might be broken even after recipients unblock them in their email clients. Here’s how the problem looks.

You create an email signature and add it to your signature settings. Unfortunately, after you add it to an email and your recipients open it in their email clients, some or all images don’t show up, even if they add you to their Safe senders list or click the “show images” option. For some reason, those same images do appear in some email clients (like desktop Outlook).

The same signature in Outlook for Windows:

Outlook for Windows - working email signature

And in Outlook on the web:

Outlook on the web - missing image problem

If this story sounds familiar, here’s the most possible explanation. Technically speaking, the server at which you keep your signature images blocks hotlinking. To translate it to simpler terms, the server’s settings prevent the images from being used on other websites or web-based email clients like Outlook on the web, Outlook.com, Gmail, Yahoo and many others.

Fortunately, the problem isn’t that difficult to fix. All you need to do is to move your signature images to a different server or an image hosting service. Head on over to this step-by-step tutorial on how to upload an image to a free hosting service (e.g. OneDrive, Dropbox, etc.) and get the image’s source URL to use in email signatures.

Double spacing in email signature block

While editing an HTML email signature in OWA or Outlook, it is quite common that your template does not display the way you designed it. On of the most frequent problems is double line spacing:

Double spacing in OWA email signature

Although there are quite a few ways to solve the problem, there is one which tends to work for every formatting-related problem, including the issue with double spacing:

  1. Start from creating your email signature block in a word processor or email signature generator;
  2. Copy and paste the email signature you have created into the signature editor;
  3. Make final adjustments, if necessary.

The double-spacing problem could also be solved by using Shift + Enter key combination, instead of starting a new paragraph by simply pressing Enter. However, sometimes it might cause the signature to appear as just one line of text. The solution above guarantees that the problem is solved. Apart from that, it gives you more editing options than the built-in OWA or Outlook email signature editor.

Microsoft 365 email signature grayed out

This issue might occur if you access your Microsoft 365 email account in Outlook. If you cannot change or add a new email signature, this is most likely caused by a certain value entered into Registry. It has nothing to do with Microsoft 365 Administration, it is entirely dependent on Microsoft Windows’ functionalities. In order to repair the issue, follow those simple steps:

Important:

  • Playing with the Registry might prove to be a bad idea if you haven’t done it before. Be sure to always create a registry backup before you start working on it. This can be done by clicking File > Export… and choosing a target location for your backup.
  • Additionally, there can be value NewSignature and Reply_Signature with value type REG_SZ and value data set to name of the signature which is to be added automatically. Those Registry entries should also block changing signatures.
  1. On your keyboard, hold the Windows icon and press R.
  2. Type regedit and press Enter.
problems with email signatures in office 365 not working greyed out
  1. This will open the Registry editor. In the folder tree on the left, follow the path: HKEY_Current_User > Software > Microsoft > Office > X > Common > MailSettings
  2. If there is a value named DisableSignatures and is set to 1, modify it so that it is set to 0.
Office 365 signature problems - Regedit settings

Email signatures don’t show up directly under replies or forwards

A well-known issue often discussed among Exchange Online administrators is email signatures landing at the bottom of email conversations. Unfortunately, Exchange Online does not provide a way to overcome this problem natively. What is more, if you do not add an exception to your mail flow rule, you may experience your email signature being doubled.

Currently, the only way to automatically add email signatures directly under replies or forwards is to use a third-party solution. Your best bet would be trying out CodeTwo Email Signatures 365.

Microsoft 365 email signatures are not displayed in Sent Items

Another issue that companies often face is that email signatures inserted on the server’s side are not visible in the sender’s Sent Items folder. This might cause problems if you have a disclaimer that should be attached to every sent email, but you are not able to verify it. Not including disclaimers in your emails may cause problems of a legal nature.

There is a workaround – instead of appending disclaimers on the server level, you can create one email signature template and distribute it to all users. Then, just instruct them to insert the disclaimer in their email clients.

Unfortunately, although it solves one problem, it may generate a list of new ones. To name a few:

  • Employees may fail to implement the email signature or simply ignore the request to set it up.
  • In case users use more than just one email client, the signature may look different across the company.
  • Every change to email signature would have to be implemented on all the machines every time it occurs.

In order to view Microsoft 365 email signatures and disclaimers in the Sent Items folder, you will need to use CodeTwo Email Signatures 365 – the first Microsoft 365 signature manager on the market to offer such a feature.

These are the most frequent problems you might experience with email signatures in Microsoft 365. If you experience any other issues, be sure to let us know about them in the comments. We will try to address those problems to the best of our abilities.