[Update]: This article was first published on January 27, 2017. It was updated with new problems and their solutions.

In Office 365, there are some situations in which your email signatures stop working. Here is a quick access list of the most frequent email signature management problems, with solutions:

• Broken email signature formatting
• A new email signature cannot be set up or missing email signatures
• Double email signatures in Office 365
• Office 365 signatures cannot be edited
• No images in Office 365 email signature
• Double spacing in email signature block
• Office 365 email signature grayed out
• Email signatures don’t show up directly under replies or forwards
• Office 365 email signatures are not displayed in Sent Items