Step 1: In the Mail view, click Home > New Email to create a new email.
Step 2: Now a new Message window opens, and please clicks Insert > Signature > Signatures.
Step 3: In the opening Signatures and Stationery dialog box, select the signature you wish to delete in the Select Signature to edit box and click the Delete button.
Step 4: In the popping out Microsoft Outlook dialog box, please click the Yes button.
Step 5: Click the OK button in the Signatures and Stationery dialog box, and then close the new email without saving.