Hi @Tega Ajogun ,
Welcome to our forum!
Based on my research and test, i found the Signatures in Word and Outlook are not universal. So i'm afraid the you need to create a signature in Outlook manually. More information: Create an email signature in Outlook.
Hope to help you!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.