Unable to add Email Signature in Microsoft Outlook on Windows

We all use an email signature in our emails in order to facilitate easy contact references with whoever we’re mailing. Email Signatures can be considered as a word-spreader for you and helps people get to know about you. In Outlook 2016/2013/2010, you can configure custom signatures for POP, IMAP, MAPI or Exchange email accounts. If you’re a beginner with Outlook, here is a quick revision for how to create custom signatures:

Add Signature to emails in Outlook

We have already seen how to create and add an email signature in Outlook. Let us briefly touch upon this procedure.

1. Open Outlook. Click FILE.


2. Then click Options in the left pane of the following window:


3. Moving on, in the Outlook Options window, click Mail in the left pane, then click Signatures in the right pane which is labeled as Create or modify signatures for messages. By clicking it, you should be able to add your custom signature.


However, we have seen that some users are unable to or cannot add custom signature window by click Signatures option in the above-shown window. If you face this situation, you may want to see if the following helps you.

Unable To Add Signature In Microsoft Outlook

Making mistakes while manipulating registry could affect your system adversely. So be careful while editing registry entries, also its better to create a System Restore point before proceeding.

1. Press Windows Key + R combination, type put regedit in Run dialog box and hit Enter to open the Registry Editor.

 Fix: The attachment size exceeds the allowable limit In Outlook 2013

2. Navigate here:

For 32-bit installation:


For 64-bit installation


Unable To Add Signature In Outlook 2013

3. In the right pane of LocalServer32 key, for both the (Default) and LocalServer32 named registry strings, click them one by one set their Value data to:

For 32-bit Office installation on 32-bit Windows and for 64-bit Office installation on 64-bit Windows:

C:\Program Files\Microsoft Office 15\root\Office 15\Outlook.exe

For 32-bit Office installed on 64-bit Windows:

C:\Program Files(x86)\Microsoft Office 15\root\Office 15\Outlook.exe


Once you’re done with this, close Registry Editor and reboot the machine, your problem should by fixed.

That’s it!

PS: Please also read the comments .

Posted by on , in Category Office with Tags
An Electrical Engineer by profession, Kapil is a Microsoft MVP and a Microsoft Content Creator. Please read the entire post & the comments first & create a system restore point before making any changes to your system.